Proxy startup improvements

[scbedd]

I am adding a couple other items that I am seeing while exploring the requirements.

• When initializing, attempt to start the container using podman before using the heavier and more error-prone docker.
• We can remove the code targeting different versions
  • The correct repo to use (now that we publish a multiplatform issue) is engsys/test-proxy. The tagging method based off file should stay.
  • We no longer publish a windows image, as we no longer support docker in CI. Better to just rip this out entirely.
• Allow optional auto-detection + passing on to the docker initialize of a couple environment variables.
  • GIT_COMMIT_OWNER
  • GIT_COMMIT_EMAIL
  • GIT_TOKEN
  • Here is an example of passing environment variables to docker/podman.
• We should add a timeout of 1 minute to all proxy interactions. If we time out, we should give a recognizable "I can't talk to the test proxy for some reason" error. Currently we just hang if there is a proxy communication failure.

I think these are the high points.

[azure-sdk]

Label prediction was below confidence level 0.6 for Model:ServiceLabels: 'azure-spring:0.18326132,Azure.Core:0.10056478,Storage:0.098949455'