Adds a Dataflow integration test suite for Delta Lake

[chamikaramj]

Data gets generated as a part of the test and gets deleted at the end.

Adding as a post-commit suite to make submits faster.

Uses the Managed I/O API.

This fixes #38558.

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Summary of Changes

Hello, 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 introduces a new post-commit integration test suite for Delta Lake using the Dataflow runner. The goal is to improve test coverage and ensure that Delta Lake IO operations function correctly within the Dataflow environment, utilizing the Managed I/O API.

Highlights

• Integration Test Suite: Added a new Dataflow integration test suite for Delta Lake to ensure robust functionality in production-like environments.
• Build Configuration: Updated the build configuration to include necessary dependencies for Google Cloud Platform and added a new task for running Dataflow integration tests.
• CI Trigger: Introduced a trigger file to enable the new post-commit test suite.

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Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/beam_PostCommit_Java_Delta_IO_Dataflow.yml

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Code Review

This pull request introduces integration tests for DeltaIO (DeltaIOIT) on Google Cloud Dataflow, along with the necessary Gradle build configuration and a GitHub Actions trigger file. The feedback focuses on improving the portability and robustness of the integration tests by dynamically resolving the GCS bucket and project ID from the pipeline options instead of using hardcoded values, adding a null check for the storage client during teardown, and avoiding closing the shared GCS client.

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