[CI] Improvements

[christiangnrd]

Switch to test matrices so it's easier to make changes. Also set --quickfail on nightly

[christiangnrd]

I cancelled the jobs that this PR doesn't touch for runner resource reasons

[pxl-th]

I'd still go with removing 1.11 from CI and making it best-effort for now, waiting ~8 hours for PR to run in CI is a bit hilarious.
But I saw @simeonschaub does something with 1.11, so I won't push if it's really needed.

[simeonschaub]

I'm not opposed to dropping 1.11 support to just be on a best-effort basis and not run CI. I know a lot of the Enzyme ecosystem is still kind of stuck at 1.11, but that might be changing, so the question is really whether there's still a noteworthy userbase there, as it's likely 1.11 will regress with no CI

[pxl-th]

#1037 made CI ~2x faster, so let's leave 1.11 :)