feat(ingest): Add Metadata Ingestion Source Cassandra support

[havramar]

Add Metadata Ingestion Source Cassandra support

Checklist

• [x] The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• [x] Links to related issues (if applicable)
• [x] Tests for the changes have been added/updated (if applicable)
• [x] Docs related to the changes have been added/updated (if applicable)

[github-actions[bot]]

Unit Test Results (build & test)

  69 files  ±0    69 suites  ±0   2m 45s :stopwatch: +12s 313 tests ±0  313 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit 8ffa072d. ± Comparison against base commit 1fd5549a.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

Unit Test Results (metadata ingestion)

       5 files  ±0         5 suites  ±0   1h 31m 13s :stopwatch: - 4m 5s    551 tests +1     547 :heavy_check_mark: ±0    3 :zzz: ±0  1 :x: +1  2 529 runs  +2  2 455 :heavy_check_mark: +1  73 :zzz: ±0  1 :x: +1 

For more details on these failures, see this check.

Results for commit 8ffa072d. ± Comparison against base commit 1fd5549a.

:recycle: This comment has been updated with latest results.

[havramar]

Thank for your review @kevinhu. I have applied your suggestions.

[jjoyce0510]

Closing this PR due to inactivity. We are definitely interesting in accepting a Cassandra source, but our framework has changed quite dramatically in the past year and this PR will need to be updated to support.

Thanks John