Add UUID support in import/export templates

[lagarwal1]

feat: Add support for importing/exporting UUID columns as strings

Manual Tests in Cloud Devel

Avro

GSQL

Export
Import

Postgres

Export
Import

CSV

GSQL

Export
Import

Postgres

Export
Import

[codecov]

Codecov Report

Attention: Patch coverage is 51.85185% with 39 lines in your changes missing coverage. Please review.

Project coverage is 46.89%. Comparing base (2631a1d) to head (baae898).

Files with missing lines	Patch %	Lines
...e/beam/it/gcp/spanner/matchers/SpannerAsserts.java	0.00%	13 Missing ⚠️
...d/teleport/templates/common/SpannerConverters.java	0.00%	4 Missing and 4 partials ⚠️
...oud/teleport/spanner/AvroSchemaToDdlConverter.java	20.00%	3 Missing and 1 partial ⚠️
...le/cloud/teleport/spanner/TextImportTransform.java	0.00%	2 Missing and 2 partials ⚠️
.../apache/beam/sdk/io/gcp/spanner/SpannerSchema.java	0.00%	2 Missing and 2 partials ⚠️
...le/cloud/teleport/spanner/CSVRecordToMutation.java	0.00%	2 Missing ⚠️
...google/cloud/teleport/spanner/ExportTransform.java	0.00%	2 Missing ⚠️
...cloud/teleport/spanner/SpannerRecordConverter.java	77.77%	0 Missing and 2 partials ⚠️

❌ Your patch check has failed because the patch coverage (63.93%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #2145   +/-   ##
=========================================
  Coverage     46.88%   46.89%           
- Complexity     4343     4346    +3     
=========================================
  Files           874      874           
  Lines         52070    52106   +36     
  Branches       5461     5485   +24     
=========================================
+ Hits          24415    24434   +19     
- Misses        25910    25921   +11     
- Partials       1745     1751    +6     

Components	Coverage Δ
spanner-templates	68.80% <63.93%> (+<0.01%)	⬆️
spanner-import-export	65.63% <63.93%> (+0.02%)	⬆️
spanner-live-forward-migration	76.50% <ø> (ø)
spanner-live-reverse-replication	78.67% <ø> (ø)
spanner-bulk-migration	87.87% <ø> (ø)

Files with missing lines	Coverage Δ
...le/cloud/teleport/spanner/AvroRecordConverter.java	99.69% <ø> (ø)
...teleport/spanner/BuildReadFromTableOperations.java	44.92% <100.00%> (+9.33%)	⬆️
...oud/teleport/spanner/DdlToAvroSchemaConverter.java	93.05% <100.00%> (+0.02%)	⬆️
...gle/cloud/teleport/spanner/TextImportPipeline.java	0.00% <ø> (ø)
...oogle/cloud/teleport/spanner/common/SizedType.java	92.10% <100.00%> (+0.25%)	⬆️
...com/google/cloud/teleport/spanner/common/Type.java	90.74% <100.00%> (+0.42%)	⬆️
.../com/google/cloud/teleport/spanner/ddl/Column.java	84.68% <100.00%> (+0.57%)	⬆️
...google/cloud/teleport/templates/TextToSpanner.java	23.43% <100.00%> (+0.40%)	⬆️
...le/cloud/teleport/spanner/CSVRecordToMutation.java	78.44% <0.00%> (-1.38%)	⬇️
...google/cloud/teleport/spanner/ExportTransform.java	16.00% <0.00%> (ø)
... and 6 more

... and 3 files with indirect coverage changes

[lagarwal1]

this is needed since Value objects null value string rep gives capital NULL which fails with java null value comparison in tests