nodejs-bigtable feat: modernization part 2

This is a follow-up for these two PRs:

https://github.com/googleapis/nodejs-bigtable/pull/1739 https://github.com/googleapis/nodejs-bigtable/pull/1740

This takes care of some missing pieces that were discovered by further discussion:

GcRuleBuilder is a more TypeScript-heavy way to validate ModifyColumnFamilies garbage collection rules, with type checking taking care of a lot of the constraints, and some minimal runtime checking for JavaScript users.
Rather than raw GAPIC, the focus has shifted to selective GAPIC subclasses that can augment them. This is specifically done to assist with RestoreTable and waiting for table consistency.
Data plane samples have been removed, as we don't want to encourage users to use them.
Generated samples and tests have been auto-edited to use the selective GAPIC classes.
Manual sample snippets have been updated to reflect the expected admin access and GcRuleBuilder usage.

There is still a CI issue that will need to be corrected before this can be merged. I don't think it's the result of this change, but I also don't want to chance it.

Dec 11 '25 21:12 feywind

Here is the summary of changes.

You are about to delete 11 region tags.

samples/generated/v2/bigtable.check_and_mutate_row.js:28, tag bigtable_v2_generated_Bigtable_CheckAndMutateRow_async
samples/generated/v2/bigtable.execute_query.js:28, tag bigtable_v2_generated_Bigtable_ExecuteQuery_async
samples/generated/v2/bigtable.generate_initial_change_stream_partitions.js:28, tag bigtable_v2_generated_Bigtable_GenerateInitialChangeStreamPartitions_async
samples/generated/v2/bigtable.mutate_row.js:28, tag bigtable_v2_generated_Bigtable_MutateRow_async
samples/generated/v2/bigtable.mutate_rows.js:28, tag bigtable_v2_generated_Bigtable_MutateRows_async
samples/generated/v2/bigtable.ping_and_warm.js:28, tag bigtable_v2_generated_Bigtable_PingAndWarm_async
samples/generated/v2/bigtable.prepare_query.js:28, tag bigtable_v2_generated_Bigtable_PrepareQuery_async
samples/generated/v2/bigtable.read_change_stream.js:28, tag bigtable_v2_generated_Bigtable_ReadChangeStream_async
samples/generated/v2/bigtable.read_modify_write_row.js:28, tag bigtable_v2_generated_Bigtable_ReadModifyWriteRow_async
samples/generated/v2/bigtable.read_rows.js:28, tag bigtable_v2_generated_Bigtable_ReadRows_async
samples/generated/v2/bigtable.sample_row_keys.js:28, tag bigtable_v2_generated_Bigtable_SampleRowKeys_async

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Dec 11 '25 21:12 snippet-bot[bot]

Warning: This pull request is touching the following templated files:

README.md - README.md is managed by synthtool. However, a partials file can be used to update the README, e.g.: https://github.com/googleapis/nodejs-storage/blob/main/.readme-partials.yaml

Dec 11 '25 21:12 generated-files-bot[bot]

The CI is really not cooperating here (timeouts, quota errors, etc) but the code itself should be okay to review.

Dec 17 '25 19:12 feywind