.cirlceci: Keep tags that look like a sha1 (#38483)
Summary:
Previous attempts to get this right:
* https://github.com/pytorch/pytorch/pull/38335
* https://github.com/pytorch/pytorch/pull/38279
* https://github.com/pytorch/pytorch/pull/37976
This tag kept getting deleted before the docker image ci workflow could
be merged causing it to have upstream breakages.
It'd be best to make sure the garbage collector just doesnt garbage
collect it.
This is a pre-step to merge https://github.com/pytorch/pytorch/pull/38484
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/38483
Differential Revision: D21577359
Pulled By: seemethere
fbshipit-source-id: c4e0709bd8fff8f24a988b60eaa9f8c01576ef2f
