fix: Add labels to converter for listTables method (#3735)

[tloszabno]

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Fixes #3735 ☕️

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[PhongChuong]

PR looks good.
Just a minor change suggested for the unit test.
Thanks for creating a fix.

[PhongChuong]

Nit. move ImmutableMap.of("key", "value") to static final var and use it in the validation. I.e.,

  private static final ImmutableMap<String, String> TABLE_LABELS = ImmutableMap.of("key", "value");
...
  private static final TableInfo OTHER_TABLE_WITH_LABELS_INFO = TableInfo.newBuilder(OTHER_TABLE_ID, TABLE_DEFINITION)
      .setLabels(TABLE_LABELS)
      .build();
...
    assertEquals(TABLE_LABELS, page.getValues().iterator().next().getLabels());

[tloszabno]

Hello @PhongChuong
Thank you for the review.
Suggestion applied.

[PhongChuong]

/gcbrun

[PhongChuong]

@tloszabno ,
Looks good. Thank you for adding the suggestions.

Can you:

1. Run mvn com.coveo:fmt-maven-plugin:format to fix formatting.
2. Fix the CLA pre-merge failure, see https://github.com/googleapis/java-bigquery/blob/main/CONTRIBUTING.md#contributor-license-agreement

[PhongChuong]

/gcbrun

[PhongChuong]

Thank you for the fix.

[tloszabno]

@PhongChuong can you trigger a release for that fix #3739?
Or if the rules for release are different, when do you predict the release could happen?
Thanks