ci: Add anaconda pruning to CI pipeline (#44651)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44651
Adds pruning for our anaconda channels (pytorch-nightly, pytorch-test)
into our CI pipeline so that it gets run on a more consistent basis.
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: walterddr
Differential Revision: D23692851
Pulled By: seemethere
fbshipit-source-id: fa69b506b73805bf2ffbde75d221aef1ee3f753e
