Prior massive change of mine went through pre-merge CI tests just fine, but the post-merge build process blew up because a very large list of possible arches was missing aarch64. For various reasons the pre-merge CI tests (which take minutes) are necessarily more limited than the post-merge (which take hours).

A massive list of labels gets one more label so there's no style cleanup concerns, and our CI is already red so its not getting any redder.

The prior real PR was reviewed and everyone missed the label that wasn't there.

Turns out the fairly massive CI test that I wrote caught the bug that everyone's human eyeballs entirely failed to catch (and I doubt anyone who reviewed it actually went through the code in the CI test in the same level of detail that I went through in order to create it).