chore: Add GitHub Actions workflow for PR validation (#2007) (9.5)

[ZheSun88]

• chore: Add GitHub Actions workflow for PR validation

Replaces TeamCity PR validation build with GitHub Actions workflow. Includes Maven build, test execution with Sauce Labs integration, and artifact collection for test failures.

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• Update validation.yml

• fix: Update Sauce Connect to v5.x and configure PRO_KEY environment variable

• Upgrade Sauce Connect from 4.9.2 to 5.2.0
• Update command-line arguments to use new v5 syntax (--username, --access-key, --tunnel-name)
• Configure TB_LICENSE secret as PRO_KEY environment variable
• Remove inline license parameter from Maven command

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• fix: Correct Sauce Connect 5.x download URL format

• Fix URL to include version in path: /sauce-connect/{VERSION}/sauce-connect-{VERSION}_linux.x86_64.tar.gz
• Update to latest version 5.2.3
• Fix extracted directory path (./sauce-connect/sc instead of ./sauce-connect-{VERSION}/sc)

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• refactor: Merge format-check workflow into validation workflow

• Add format-check job to validation workflow to run in parallel with build-and-test
• Remove separate format-check.yml workflow file
• Format validation now runs as part of the main PR validation pipeline

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• feat: Add Maven cache to format-check job

• Add Maven dependency caching to format-check job
• Uses same cache key as build-and-test job for artifact sharing
• Prevents redundant downloads between parallel jobs

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• fix: Run format-check and build-and-test jobs sequentially

• Add 'needs: format-check' to build-and-test job
• Ensures proper cache sharing between jobs
• Prevents cache conflicts and race conditions
• Format check must pass before build and tests run

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• chore: set TB License

• fix: Correct Sauce Connect binary path for version 5.x

The extracted directory structure for Sauce Connect 5.x is sc-${VERSION}-linux/bin/sc, not sauce-connect/sc

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• fix: Improve Sauce Connect setup and monitoring

• Use hardcoded version in path (5.2.3) instead of variable expansion
• Wait for specific "Sauce Connect is up" message instead of sleeping
• Fail fast if SC process dies or doesn't start within 2 minutes
• Save PID for proper cleanup
• Include SC logs in failure artifacts for debugging

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• Fix version

• refactor: Use official sauce-connect-action v3 instead of manual setup

• Replace manual Sauce Connect download and setup with saucelabs/sauce-connect-action@v3
• Remove manual cleanup step as the action handles it automatically
• Simplify tunnel ID management
• Remove sc.log from artifacts as it's not generated with the action

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• use existing version, see No tag with name v3 saucelabs/sauce-connect-action#101

• Secrets

• .

• region

• fix: Separate error screenshots into their own artifact

Split test artifacts into two separate uploads:

• error-screenshots: Contains only screenshot files from test failures
• test-reports: Contains surefire and failsafe reports

This makes it easier to find and download just the screenshots when debugging failures.

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• fix: Enable localhost proxying for Sauce Connect tunnel

Add --proxy-localhost flag to allow Sauce Labs to connect to localhost addresses, which is required for the test setup.

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• fix: Use correct proxyLocalhost parameter for Sauce Connect

Replace scArgs with the proper proxyLocalhost: allow parameter to enable localhost proxying in Sauce Connect tunnel.

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• no phantomjs

• fix: Exclude failsafe-summary.xml from test result parsing

Change file patterns to only include TEST-*.xml files, excluding failsafe-summary.xml which is not in JUnit XML format and causes the test result publisher to fail.

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• upgrade java version to 21 and remove master branch

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