[AI] Run Live API integration tests on schedule only

[andrewheard]

• Updated the flaky LiveSessionTests from FirebaseAIIntegration to run on scheduled (nightly) and manual CI runs only.
• Added NSUnbufferedIO=YES to xcbeautify invocation to get some output before testing completes.
• Updated the macos-15 job to only build the integration tests. Tests now run only on macos-26.
  • Reverted back to the pre-scripts/repo.sh refactor (infra(all): Introduce generic script for integration tests #15415) for now to simplify build-for-testing vs. test switching.

#no-changelog

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[gemini-code-assist]

Summary of Changes

This pull request optimizes the CI pipeline for FirebaseAI integration tests by introducing conditional execution based on environment variables. These changes ensure that potentially flaky or resource-intensive tests are only executed during scheduled or manual runs, improving overall CI stability and efficiency. Additionally, the update enhances log output reliability and refines the build-and-test workflow within the repository scripts.

Highlights

• Test Execution Control: Updated FirebaseAI integration tests to run only when specific environment variables are set, restricting them to scheduled or manual CI runs.
• CI Script Improvements: Enabled unbuffered I/O for xcbeautify to improve real-time log visibility during CI execution.
• Build Process Refinement: Separated build and test phases for FirebaseAI integration tests in the build script to simplify CI configuration.

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Ignored Files

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

Activity

• Pull request created by andrewheard.
• Gemini Code Assist documentation comment posted.
• Author requested a summary via /gemini summary.