Enable service attributes in the OTLP googlecloudmonitoring pipeline

[braydonk]

Description

This PR enables service attributes in the OTLP pipeline. It does this by enabling the field in the non-system googlecloudexporter pipeline, but strips away the resource attributes from all third-party app pipelines. This should allow us to update the service attribute expectations one 3P app at a time, while fixing the problem for the googlecloudmonitoring OTLP pipeline.

Related issue

b/438861396

How has this been tested?

The integration tests in this PR will be the main test other than unit and golden tests.

Checklist:

• Unit tests
  • Unit tests do not apply.
  • Unit tests have been added/modified and passed for this PR.
• Integration tests
  • Integration tests do not apply.
  • Integration tests have been added/modified and passed for this PR.
• Documentation
  • This PR introduces no user visible changes.
  • This PR introduces user visible changes and the corresponding documentation change has been made.
• Minor version bump
  • This PR introduces no new features.
  • This PR introduces new features, and there is a separate PR to bump the minor version since the last release already.
  • This PR bumps the version.

[braydonk]

I didn't set to draft before because I wanted the GitHub Actions to run. Consider this me manually considering this "out of draft" and ready for review.

[jefferbrecht]

LGTM assuming the tests pass

[braydonk]

The only failed workflow was a quota issue. Merging.

[jefferbrecht]

Test failures are unrelated; merging