.github: Migrate ecr_gc to github actions (#62284)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62284
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Test Plan: Imported from OSS
Reviewed By: malfet, zhouzhuojie
Differential Revision: D29943356
Pulled By: seemethere
fbshipit-source-id: 493592baf2f7abe206e1fb17438bac4e908b1251
