- with a static matrix, we can determine which releases get caching
- cache is huge, only one should actually have it
- if more than one has it, cache is not enough, and will just churn (and be actually slower)
- don't ignore the 2nd buildx try's failure (if it failed twice, it failed)
- timeout build+push after 40 minutes
- introduce retrying of the actual build+push, with a random sleep for ghcr.io
- add Sid and Noble to static build list