Revert D29999785: Reland D29943356: .github: Migrate ecr_gc to github actions
Test Plan: revert-hammer
Differential Revision:
D29999785 (https://github.com/pytorch/pytorch/commit/49dc8277120ef2a1cf9757b5986980526e17db24)
Original commit changeset: bb9285076551
fbshipit-source-id: c26b39fb2d3c361015ce7f205d3f5f4232845289
