Add a new precommit workflow to test flink container

[liferoad]

Address #33180

Will trigger this later with:

on:
  pull_request_target:
    paths:
      - 'model/**'
      - 'sdks/python/**'
      - 'release/**'
      - 'sdks/java/io/kafka/**'
      - 'runners/core-construction-java/**'
      - 'runners/core-java/**'
      - 'runners/extensions-java/**'
      - 'runners/flink/**'
      - 'runners/java-fn-execution/**'
      - 'runners/reference/**'
      - 'release/trigger_all_tests.json'
      - '.github/trigger_files/beam_PreCommit_Flink_Container.json'
  push:
    branches: ['master', 'release-*']
    tags: 'v*'
  schedule:
    - cron: '0 */6 * * *'
  workflow_dispatch:

For now, just manually trigger this for developing.

Create PreCommit Flink Container workflow

Description

This PR introduces a new PreCommit workflow to test Flink container functionality across Go, Python, and Java SDKs. The workflow runs combine load tests in each language to verify the Flink container's functionality.

Key Features

• Runs on pull requests targeting Flink-related changes
• Tests container functionality with three SDKs:
  • Go Combine test
  • Python Combine test
  • Java Combine test
• Uses self-hosted runner with Ubuntu 20.04
• Includes automatic Flink cluster setup and teardown
• Maintains consistent test parameters across languages

Implementation Details

• Triggers on:
  • PRs affecting Flink runners
  • Push to master/release branches
  • Manual workflow dispatch
• Uses Docker environments for each SDK
• Sets consistent parallelism and test parameters
• Includes proper error handling and cleanup

Notes

• Timeout set to 45 minutes for complete workflow
• Individual test steps timeout at 10 minutes
• Cluster teardown happens even if tests fail

Fixes

N/A

Related PRs

N/A

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To check the build health, please visit https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI or the workflows README to see a list of phrases to trigger workflows.

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