Support Table History Policy in Snapshot Expiration Job

[Will-Lo]

Summary

[Issue] Briefly discuss the summary of the changes made in this
pull request in 2-3 lines.

Following up from #262 and #259
this PR adds support for snapshot expiration table maintenance job to use the history policies defined.

Most notably snapshot expiration will follow the settings of maxAge, granularity, and versions as follows:

1. If maxAge is provided, it will expire snapshots older than maxAge in granularity timeunit.
2. If versions is provided, it will retain the last versions snapshots regardless of their age.
3. If both are provided, it will prioritize maxAge; only retain up to versions number of snapshots younger than the maxAge. This is done by pruning the snapshots older than maxAge, and then running a second expiration to keeping N versions after that.

Note: If versions are defined and there are less than N versions in the history, then there were not enough commits (within that timespan if defined). Snapshot expiration will always keep at least 1 version.

The default behavior of snapshot expiration job will remain the same, keep snapshots within the last 3 days.

Changes

• Client-facing API Changes
• Internal API Changes
• Bug Fixes
• New Features
• Performance Improvements
• Code Style
• Refactoring
• Documentation
• Tests

For all the boxes checked, please include additional details of the changes made in this pull request.

Testing Done

• Manually Tested on local docker setup. Please include commands ran, and their output.
• Added new tests for the changes made.
• Updated existing tests to reflect the changes made.
• No tests added or updated. Please explain why. If unsure, please feel free to ask for help.
• Some other form of testing like staging or soak time in production. Please explain.

For all the boxes checked, include a detailed description of the testing done for the changes made in this pull request.

Additional Information

• Breaking Changes
• Deprecations
• Large PR broken into smaller PRs, and PR plan linked in the description.

For all the boxes checked, include additional details of the changes made in this pull request.

[jiang95-dev]

One small change request.

[autumnust]

thanks for adding the test cases for both configuration provided

[abhisheknath2011]

Thanks @Will-Lo.

[jiang95-dev]

LGTM