Verify the source files (i.e the 3p version but not our build files) on master and v8.0 are the same for a each third party and copy over the bazel build files. If they are different spin off a specific ticket for each third party which has differences across master. For those tickets we will need to generate/write custom build files for 8.0.

The verification should be a script which use git to checkout the files from master, excludes our custom build files, and the verify that the checkout produced no diffs. If the checkout produced no diffs then git should be used to check out the relevant build files.