Enable Arcade V3 publishing in PR Validation

[JoeRobich]

Switch to v3 publishing in order to use publish symbol exclusions. Also, sets a more descriptive build number including the PR author and title.

Example of fancy build number:

Test Run: https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=9523427&view=results (microsoft) Test Insertion: waiting for it (microsoft)