**Backport:** https://codeberg.org/forgejo/forgejo/pulls/6646
Allow ci go version to be higher than the tool chain. This will fix the current build issues on forgejo branch
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/6810
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
ci: cache frontend build across jobs
ci: ensure caches are saved with zstd
work around https://github.com/actions/cache/issues/1169
ci: require unit tests for remote cacher
- prevents unnecessary runs in case the unit tests already fail
- starts the integration tests about 2 minutes earlier
- should give some overall speedup to the CI run, because the long integration tests are run and finish earlier, and the cacher tests should still usually finish in time
- does not save any computing resources, just provides quicker results when runners are not under high load
