move caffe2/proto/ to its own Bazel package (#97324)
move caffe2/proto/ to its own Bazel package
Summary:
This is just to break up build files and make the system easier to
reason about during the transition to the common build system.
Test Plan: Verified locally and rely on CI.
Reviewers: sahanp
Subscribers:
Tasks:
Tags:
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Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/pytorch/pytorch/pull/97324).
* #97337
* #97336
* #97335
* #97334
* #97325
* __->__ #97324
* #97323
* #97322
Pull Request resolved: https://github.com/pytorch/pytorch/pull/97324
Approved by: https://github.com/malfet
