[spannerchangestreamstobigquery] Spanner Change Stream to BigQuery UUID support

[googledrew]

Fix for #3703

[gemini-code-assist]

Summary of Changes

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This pull request introduces support for the UUID data type within the Spanner Change Streams to BigQuery data pipeline. The changes ensure that UUID fields, including arrays of UUIDs, are correctly identified, processed, and mapped to compatible STRING types in BigQuery. Additionally, the integration tests were updated to include scenarios for UUID data, and minor configuration improvements were made to the test suite.

Highlights

• UUID Support: Added support for UUID data types in Spanner Change Streams to BigQuery, ensuring proper mapping for both GoogleSQL and PostgreSQL dialects.
• Schema Mapping: Updated schema utility classes to correctly handle UUID and ARRAY types, mapping them to STRING in BigQuery.
• Integration Testing: Expanded test coverage with new unit and integration tests to validate UUID data ingestion and schema creation.

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[codecov]

Codecov Report

❌ Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.53%. Comparing base (5b7e228) to head (da23c50).

Files with missing lines	Patch %	Lines
...bigquery/FailsafeModJsonToTableRowTransformer.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3698      +/-   ##
============================================
- Coverage     58.55%   55.53%   -3.03%     
- Complexity     3011     6574    +3563     
============================================
  Files           581     1103     +522     
  Lines         34619    67570   +32951     
  Branches       3756     7581    +3825     
============================================
+ Hits          20271    37524   +17253     
- Misses        13301    27630   +14329     
- Partials       1047     2416    +1369     

Components	Coverage Δ
spanner-templates	88.31% <ø> (-0.45%)	⬇️
spanner-import-export	68.53% <ø> (∅)
spanner-live-forward-migration	90.22% <ø> (+0.12%)	⬆️
spanner-live-reverse-replication	83.96% <ø> (-0.02%)	⬇️
spanner-bulk-migration	92.61% <ø> (+0.07%)	⬆️
gcs-spanner-dv	89.00% <ø> (-1.31%)	⬇️

Files with missing lines	Coverage Δ
...igquery/schemautils/SpannerChangeStreamsUtils.java	80.56% <ø> (ø)
...tobigquery/schemautils/SpannerToBigQueryUtils.java	68.20% <100.00%> (ø)
...hangestreamstobigquery/schemautils/TypesUtils.java	60.00% <100.00%> (ø)
...bigquery/FailsafeModJsonToTableRowTransformer.java	0.00% <0.00%> (ø)

... and 541 files with indirect coverage changes

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[tianz101]

Added a few comments.

[tianz101]

Thank you very much for adding this uuid support.

[Abacn]

Thanks!