Remove references to GCP in PR templates and fix submodule

[hasheddan]

Signed-off-by: hasheddan georgedanielmangum@gmail.com

Description of your changes

This is a surprisingly useful PR, but was initially just created to test out the Jenkins CI configuration :man_shrugging:

Checklist

I have:

• [x] Run make reviewable to ensure this PR is ready for review.
• [x] Ensured this PR contains a neat, self documenting set of commits.
• [ ] Updated any relevant documentation, examples, or release notes.
• [ ] Updated the dependencies in app.yaml to include any new role permissions.
• [ ] Updated the stack resources documentation to include any new managed resources or classes.

[hasheddan]

@negz looks like CI doesn't like that there are no tests. I think this is safe to merge though as it passes prepare / build, which master currently does not. The next PR will presumably have tests and should pass :)