[bazel] Add BazelGMRunner.cpp.

This runner uses a CPU-only config as proof of concept. Subsequent CLs will add support for other configs.

Bug: skia:14227
Change-Id: I42f2c1a2c1c90bf579b1bc490d76b84375274f94
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/712897
Auto-Submit: Leandro Lovisolo <lovisolo@google.com>
Commit-Queue: Leandro Lovisolo <lovisolo@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
5 files changed