Update log component naming to reflect changes to the spec

The spec PR #2676 to add a log API and the followup PR #2768 to align log API / SDK component naming impacts SDKs which have been prototyping the log SDK, including python. The changes include:

LogEmitterProvider -> LoggerProvider
LogEmitter -> Logger
LogProcessor -> LogRecordProcessor
LogExporter -> LogRecordExporter

SDKs are encouraged to update component names to reflect the specification changes.

PR #2768 resets the log section of the spec compliance matrix to reflect the changes.