Lengthening underlines for titles in BQ and Pub/Sub docs.

…ration (#1177)

* chore: Removed old admin_v2 GAPIC layer (#1111)

* feat!: Generated Selective GAPIC layer for Admin API (#1112)

* chore: Updated service YAML by making all methods in BigtableInstanceAdmin public (#1113)

* refactor: Refactored classic client to use new Admin API (#1114)

* refactor: Refactored classic client to use new Admin API

* added newline after gapic_version files

* fix: Made generate_consistency_token and check_consistency public (#1116)

methods

* feat: Consistency polling + restore table for sync client in admin (#1117)

* feat: Prototyped handwritten layer

* Added newlines

* linting

* Added docstrings for restore table and consistency token polling;
removed gc_rule

* docs: owlbot related changes (#1133)

* docs: owlbot related changes

* Addressed PR feedback + made changes to toc.yml for docs pipeline

* Fixed type hint

* linting + added validation for admin section

* linting + added noqas to owlbot lines

* tests: Tests for sync client + fixes + client library versioning (#1132)

* tests: Tests for sync client + fixes + client library versioning

* Removed raise exception

* linting + name changes in tests + added test for timeout

* linting

* Fixed tests on Python 3.7

* feat: Proto-plus modifications for enforcing strict oneofs (#1126)

* feat: Proto-plus modifications for enforcing strict oneofs

* Added template directory + changed unit tests to pytest

* Finished README

* linting

* Added source of truth comment

* feat: Reworked the wait_for_consistency call (#1144)

* feat: Reworked the wait_for_consistency call

* linting

* Update google/cloud/bigtable/admin_v2/overlay/services/bigtable_table_admin/client.py

Co-authored-by: Mattie Fu <mattiefu@google.com>

* Improved documentation

* linting again

* linting

---------

Co-authored-by: Mattie Fu <mattiefu@google.com>

* feat: Async consistency polling harness (#1142)

* feat: Async consistency polling harness

* Fixed AsyncMock issue in Python 3.7

* Reworked async_consistency and added async client to __init__.py

* linting

* addressed review feedback

* linting

* feat: Restore Table LRO rework + async restore table (#1148)

* chore(tests): system tests for autogen API (#1151)

* tests: system tests for autogen API

* Fixed async system tests

* addressed review feedback

* Fixed system test failure at the end of a test run

* Linting

* more linting

* chore: Moved Admin API from google.cloud.bigtable.admin_v2 back to google.cloud.bigtable_admin_v2 (#1153)

* chore: Removed autogenerated files from the feature branch (#1170)

* chore: Merged selective GAPIC autogenerated changes into feature branch (#1175)

* chore: Merged selective GAPIC owlbot changes into feature branch

* linting

* changed comment text

* Removed redundant items

* Fixed owlbot infinitely appending text

* Added comments + fixed indentation in Owlbot

* Added anonymous credentials to client tests

* Fixed project ID issue in system tests

* Fixed docstrings and skipped system tests on emulator.

---------

Co-authored-by: Mattie Fu <mattiefu@google.com>

I accidentally merged #1134 without updating the golden files for snippetgen. This PR updates the golden files and marks the 'snippetgen' check required.

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

…ration (#1177)

* chore: Removed old admin_v2 GAPIC layer (#1111)

* feat!: Generated Selective GAPIC layer for Admin API (#1112)

* chore: Updated service YAML by making all methods in BigtableInstanceAdmin public (#1113)

* refactor: Refactored classic client to use new Admin API (#1114)

* refactor: Refactored classic client to use new Admin API

* added newline after gapic_version files

* fix: Made generate_consistency_token and check_consistency public (#1116)

methods

* feat: Consistency polling + restore table for sync client in admin (#1117)

* feat: Prototyped handwritten layer

* Added newlines

* linting

* Added docstrings for restore table and consistency token polling;
removed gc_rule

* docs: owlbot related changes (#1133)

* docs: owlbot related changes

* Addressed PR feedback + made changes to toc.yml for docs pipeline

* Fixed type hint

* linting + added validation for admin section

* linting + added noqas to owlbot lines

* tests: Tests for sync client + fixes + client library versioning (#1132)

* tests: Tests for sync client + fixes + client library versioning

* Removed raise exception

* linting + name changes in tests + added test for timeout

* linting

* Fixed tests on Python 3.7

* feat: Proto-plus modifications for enforcing strict oneofs (#1126)

* feat: Proto-plus modifications for enforcing strict oneofs

* Added template directory + changed unit tests to pytest

* Finished README

* linting

* Added source of truth comment

* feat: Reworked the wait_for_consistency call (#1144)

* feat: Reworked the wait_for_consistency call

* linting

* Update google/cloud/bigtable/admin_v2/overlay/services/bigtable_table_admin/client.py

Co-authored-by: Mattie Fu <mattiefu@google.com>

* Improved documentation

* linting again

* linting

---------

Co-authored-by: Mattie Fu <mattiefu@google.com>

* feat: Async consistency polling harness (#1142)

* feat: Async consistency polling harness

* Fixed AsyncMock issue in Python 3.7

* Reworked async_consistency and added async client to __init__.py

* linting

* addressed review feedback

* linting

* feat: Restore Table LRO rework + async restore table (#1148)

* chore(tests): system tests for autogen API (#1151)

* tests: system tests for autogen API

* Fixed async system tests

* addressed review feedback

* Fixed system test failure at the end of a test run

* Linting

* more linting

* chore: Moved Admin API from google.cloud.bigtable.admin_v2 back to google.cloud.bigtable_admin_v2 (#1153)

* chore: Removed autogenerated files from the feature branch (#1170)

* chore: Merged selective GAPIC autogenerated changes into feature branch (#1175)

* chore: Merged selective GAPIC owlbot changes into feature branch

* linting

* changed comment text

* Removed redundant items

* Fixed owlbot infinitely appending text

* Added comments + fixed indentation in Owlbot

* Added anonymous credentials to client tests

* Fixed project ID issue in system tests

* Fixed docstrings and skipped system tests on emulator.

---------

Co-authored-by: Mattie Fu <mattiefu@google.com>

This change non-invasively introduces dependencies of opentelemetry
bringing in the latest dependencies and modernizing them.

While here also brought in modern span attributes:
* otel.scope.name
* otel.scope.version

Also added a modernized example to produce traces as well
with gRPC-instrumentation enabled, and updated the docs.

Updates #1170
Fixes #1173
Built from PR #1172

This change adds annotations for session and session pool
events to aid customers in debugging latency issues with
session pool malevolence and also for maintainers to
figure out which session pool type is the most appropriate.

Updates #1170