[EngSys] Add PR number as a tag for RepoMan TestTemplates flow

[vhvb1989]

As the transition to AVM continues, there might be cases where we need to check a rg in the Portal and see where it came from. The current tags and name are helping to know the rg/resources are coming from the test-templates, but it is not clear if the pipeline was triggered by which PR (what changes).

Having a tag or the PR number in the name would help to understand such cases. See the last time this was required here: #3976 (comment)

[benbp]

To be consistent we can add the devops build id and other values (these env vars are auto-populated by devops). See example for our language live tests: https://github.com/Azure/azure-sdk-tools/blob/main/eng/common/TestResources/New-TestResources.ps1#L342-L345