chore: add missing headers to run/ samples by glasnt · Pull Request #4253 · GoogleCloudPlatform/nodejs-docs-samples

@glasnt

Identified in #4214, many samples in this repo are missing licence headers according to
the header-checker-lint check.

This PR adds headers for run/ samples

Note: more samples require headers, but many samples may not pass CI, so this PR is intentionally a partial fix.

Added via command `go run github.com/google/addlicense@v1.2.0 run/.`

gemini-code-assist[bot]