Switch to the new Windows AMI with conda preinstalled (#83188)
Miniconda3 has been installed in the Windows AMI (ami-04a25a5bcec5bc2bf) with all the build and test dependencies in https://github.com/fairinternal/pytorch-gha-infra/pull/41
### Testing
All Windows build and test jobs pass on canary https://github.com/pytorch/pytorch-canary/pull/134
### Issue
#83003
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83188
Approved by: https://github.com/atalman
