Convert MSAL Java PR pipeline to YAML

[Gladwin Johnson VR (gladjohn)]

Summary

• convert Azure DevOps classic definition 785 to a repository-owned YAML pipeline
• preserve the PR branch filters, daily dev schedule, secure certificate setup, and separate unit/integration Maven runs
• publish the generated JaCoCo XML report instead of the raw jacoco.exec file, which currently produces an empty coverage summary
• move from deprecated Maven@3 to Maven@4

Rollout

Create a new Azure DevOps YAML pipeline using the existing GitHub service connection, authorize the LabAuth secure file, and run it alongside definition 785 before retiring the classic pipeline.

The classic comment-based PR authorization setting and secure-file authorization remain configured in Azure DevOps rather than this YAML file.

Validation

• parsed azure-pipelines.yml successfully as YAML
• git diff --check passed

[Avery-Dunn]

Needs testing and some small changes, but approving/merging as-is to make creating a new Azure DevOps pipeline easier.