Investigate ProjectTemplate tests failure to acquire dotnet new lock.

[NTaylorMullen]

https://dev.azure.com/dnceng/internal/_build/results?buildId=638406&view=ms.vss-test-web.build-test-results-tab&runId=19850116&resultId=120564&paneView=debug

Not sure the appropriate area/feature labels to mark this with so I haven't.

[Pilchie]

👀

[pranavkm]

#21753 should address this. I'll add you to the PR @NTaylorMullen .

[mkArtakMSFT]

Thanks @pranavkm for handling the underlying issue.
Can you also unquarantine project template tests given that this is now resolved?

[pranavkm]

Done as part of #21831