[build] Enforce module-level code coverage verfication

[adamxchen]

Motivation

We want to ensure enough unit tests will be written for each new PR and gradually improve code coverage among modules.
Start with a new CI step which verifies each module has met enough line coverages. The threshold is defined per module and we can continue tweaking it as we go.

Note that this PR doesn't introduce new code coverage check, only module-level code coverage check. The former will be done in a later PR.

Testing

./gradlew jacocoTestCoverageVerification and the new CI step.

WcTest/7390

For a build that meets the coverage requirements:
https://github.com/linkedin/venice/actions/runs/3852662122/jobs/6564983018

/// no error output

For a build that doesn't meet the coverage requirements:
https://github.com/linkedin/venice/actions/runs/3852887609/jobs/6565384906

Rule violated for bundle da-vinci-client: lines covered ratio is 0.4, but expected minimum is 0.8

[huangminchn]

Thanks Adam!

[anaberezhnov]

Are you planning to skip generated and test classes from the check?

[adamxchen]

Are you planning to skip generated and test classes from the check?

For the record, I think this commit lists these classes.
Jacoco reports currently includes them but they have relatively low percentage compared to our own codes. That being said, I will try to exclude them at later time.