Refactor RowMutationInformation to use string type

[damondouglas]

This PR closes #31335 via refactoring BigQueryIO's assignment of the _CHANGE_SEQUENCE_NUMBER pseudo column from a long to fixed hex string.

All BigQuery related tests for ./gradlew :sdks:java:io:google-cloud-platform:postCommit and ./gradlew :sdks:java:io:google-cloud-platform:build passed on my local machine.

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Codecov Report

Attention: Patch coverage is 95.55556% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 71.02%. Comparing base (93cc6a5) to head (8aae6f9). Report is 4 commits behind head on master.

:exclamation: Current head 8aae6f9 differs from pull request most recent head 31a91fd

Please upload reports for the commit 31a91fd to get more accurate results.

Files	Patch %	Lines
...g/apache/beam/sdk/io/gcp/bigquery/RowMutation.java	93.33%	0 Missing and 1 partial :warning:
...sdk/io/gcp/bigquery/TableRowToStorageApiProto.java	80.00%	1 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #31323      +/-   ##
============================================
+ Coverage     68.55%   71.02%   +2.47%     
+ Complexity    14921     2986   -11935     
============================================
  Files          2636     1067    -1569     
  Lines        222073   133554   -88519     
  Branches      11825     3241    -8584     
============================================
- Hits         152234    94852   -57382     
+ Misses        63644    35591   -28053     
+ Partials       6195     3111    -3084     

Flag	Coverage Δ
java	68.61% <95.55%> (+2.89%)	:arrow_up:

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[damondouglas]

Can we add or update existing tests in StorageApiSinkRowUpdateIT? That class contains integration tests for RowMutationInformation. Would be good to have some real end-to-end tests to check this new behavior

@ahmedabu98 that test already covers the refactor behavior. For example, there's a call to RowMutationInformation.of using a long value. This is forwarded to the RowMutationInformation.of that takes the string parameter set using Long.toHexString. Adding additional tests using the string parameter directly would just test implementation details.

[ahmedabu98]

@damondouglas Sorry I mean the new behavior of having multiple sections in the CSN (e.g. a\b\c\d). I don't think that's covered in our integration tests.

[github-actions[bot]]

Reminder, please take a look at this pr: @robertwb @Abacn

[Abacn]

R: @ahmedabu98

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Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[damondouglas]

@damondouglas Sorry I mean the new behavior of having multiple sections in the CSN (e.g. a\b\c\d). I don't think that's covered in our integration tests.

@ahmedabu98 I added the test cases but to keep things simple used AAA/<n> where n was the original long.

[damondouglas]

Thank you, @ahmedabu98 . I will merge after checks pass.

[damondouglas]

Thank you, @ahmedabu98 . I will merge after checks pass.

FYI failing checks have nothing to do with code in the PR. Ran additional internal tests (see internal chat) and passed.