[SPARK-49032][SS] Add schema path in metadata table entry, verify expected version and add operator metadata related test for operator metadata format v2

[anishshri-db]

What changes were proposed in this pull request?

Add schema path in metadata table entry, verify expected version and add operator metadata related test for operator metadata format v2

Why are the changes needed?

Changes needed for version verification and for subsequent integration with state data source reader

Does this PR introduce any user-facing change?

No

How was this patch tested?

Added unit tests

===== POSSIBLE THREAD LEAK IN SUITE o.a.s.sql.execution.streaming.state.OperatorStateMetadataSuite, threads: Idle Worker Monitor for python3 (daemon=true), rpc-boss-3-1 (daemon=true), ForkJoinPool.commonPool-worker-3 (daemon=true), ForkJoinPool.commonPool-worker-2 (daemon=true), shuffle-boss-6-1 (daemon=true), ForkJoinPool.commonPool-worker-1 (daemon=true) =====
[info] Run completed in 26 seconds, 651 milliseconds.
[info] Total number of tests run: 11
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 11, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.

Was this patch authored or co-authored using generative AI tooling?

No

[anishshri-db]

@ericm-db @HeartSaVioR - could you PTAL ? thx

[ericm-db]

LGTM

[HeartSaVioR]

+1

[HeartSaVioR]

Thanks! Merging to master.