Streamline test patch application

While working issue #45 (closed), we discovered that the test patches were failing to apply, failing silently (the pipeline still returned a green status), and not specifying which patch file failed.

This indicates that that the files we're patching in gitlab-com have drifted "out of sync" with this set of patches, and when this happens in the future we need a way to quickly detect and fix the offending patch.

This commit does the following:

• Renames patches in order of application for easy collated shell expansion.

• Adds a new script to apply the patches using shell expansion. This makes adding/removing new patches easier.

• Uses set -e in the new script to ensure that failing patches fail loudly.