Adds Bazel Support V2

[tinder-maxwellelliott]

Also updates CI to run Bazel tests

[alanzeino]

Very cool! We might have to modify build.sh to install bazel before the job can run, let's see if it is installed on these mac runners that github provides

[alanzeino]

  File "/private/var/tmp/_bazel_runner/9332cfebedfd62170f1b5b8776e50dc1/sandbox/darwin-sandbox/21/execroot/__main__/bazel-out/darwin-fastbuild/bin/FBSnapshotTestCaseTests/FBSnapshotTestCaseTests.runfiles/xctestrunner/shared/plist_util.py", line 244, in _GetPlistLibModule
    plistlib.readPlist(plist_file_path)
AttributeError: module 'plistlib' has no attribute 'readPlist'

maybe we're missing something the testrunner expects, like a dependency on plistlib installed via pip and on the PATH, possibly we can just add that to the build.sh

https://github.com/google/xctestrunner/blob/master/shared/plist_util.py#L44