This removes the dependency on shared libmonosgen installed locally
and makes the artifacts usable as standalone for testing without
needing a full Mono install.
This was forgotten when renaming 3.2.4 to 3.3.
Once 3.3-stable is out and we branch off to 3.3, the BASE_BRANCH should
be bumped to 3.3 in that branch.
We often hit "Too Many Requests" errors when uploading the cache with
`actions/cache` because there's a limit of 10 GB every 5 minutes, and we can
easily go over it when we amend or merge several PRs in a short timespan.
This will make the CI artifacts less useful for debugging crashes but there's
no real way around this.
(cherry picked from commit caea551d41)
Rémi Verschelde
Fabio Alessandrelli
Gordon MacPherson