define the caffe2_serialize target in Bazel (#75942)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75942
This also requires changes to the target definition and the xplat translator to get it working.
ghstack-source-id: 154678046
Test Plan: Verify locally and rely on CI.
Reviewed By: malfet
Differential Revision: D35704597
fbshipit-source-id: 6b0d9f5a044609b24dda656f80233ba6186c097f
(cherry picked from commit 6de43c5ca7a973c9f8b71f4d60d4d5e85cc2ba21)
