ci: Migrate windows conda to GHA
Signed-off-by: Eli Uriegas <eliuriegasfb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/73262
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Approved by: https://github.com/malfet, https://github.com/atalman
