[Java]Fix infinite retry issue in BigQuery getDatasetLocation() for non-existent datasets

[Suvrat1629]

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This PR fixes #28438 where BigQuery operations would retry indefinitely when trying to access a non-existent dataset.

The BigQueryHelpers.getDatasetLocation() method was wrapping all exceptions (including IOException from dataset-not-found errors) in RuntimeException. This caused the retry mechanism in PendingJob.runJob() to treat dataset lookup failures as retryable job execution errors, leading to infinite retries that ignored the configured MAX_RPC_RETRIES limit of 9.

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Summary of Changes

Hello @Suvrat1629, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical flaw in BigQuery integration where attempts to query or manipulate non-existent datasets resulted in an infinite retry loop, consuming resources and masking the true error. The changes refactor the exception handling within the BigQueryHelpers.getDatasetLocation() method and its consumers, ensuring that dataset-not-found errors are now correctly identified and immediately propagated as specific exceptions, thereby preventing indefinite retries and providing more actionable feedback to users.

Highlights

• Resolved Infinite Retry Issue: Fixed a bug where BigQuery operations would endlessly retry when attempting to access a non-existent dataset, previously identified as issue [Bug]: Dataflow keeps retrying to obtain an already deleted BigQuery dataset #28438.
• Improved Exception Handling: The BigQueryHelpers.getDatasetLocation() method now explicitly throws IOException and InterruptedException, instead of wrapping all exceptions in a generic RuntimeException.
• Specific Error Messaging: Calling methods (UpdateSchemaDestination, WriteRename, WriteTables) now catch these specific exceptions and provide clearer error messages, particularly for "dataset not found" scenarios, preventing infinite retries.
• New Unit Tests: Added unit tests for BigQueryHelpers.getDatasetLocation() to verify correct exception propagation for non-existent datasets and proper location retrieval for valid ones.

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[Suvrat1629]

@chamikaramj Gentle ping, please take a look.
Thank you.

[github-actions]

Reminder, please take a look at this pr: @chamikaramj

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

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Assigning new set of reviewers because Pr has gone too long without review. If you would like to opt out of this review, comment assign to next reviewer:

R: @chamikaramj for label java.

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Reminder, please take a look at this pr: @chamikaramj