Create PostCommit smoke test suite (besides phrase triggered one)

Load tests are very huge and consume lots of resources. In order to avoid unnecessary runs on not failing code, we should have a small post-commit variant that would validate if everything works well. If run post commit (on every commit) such smoke tests will give us time to fix build/runtime/other errors before actual load test suites are run. 

Imported from Jira [BEAM-6449](https://issues.apache.org/jira/browse/BEAM-6449). Original Jira may contain additional context.
Reported by: ŁukaszG.
Subtask of issue #19230