[infra] Add chrome_release_branch script

Bug: skia:8932
Change-Id: I258fd8f5262e5f87800b85f9bcbd0c4982ef1e3d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/208503
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>
6 files changed