Cv32e40s/merge master to rel 8

Created by: silabs-robin

Merge procedure, 40s master->rel.

Some (known) failures in "rel_check":

• csrs/counters tests
  • (Has to be reworked, synced with ISS, etc. Work is planned/ongoing.)
• debug_assert
  • (A fix is near ready in rtl repo)
• corev_rand_interrupt
  • (I don't know why this fails, but it was not introduced by this merge procedure step.)

This is currently our only process for syncing the 40x/40s directories. Should we consider being even stricter about what we allow to master, and maybe sync 40x/40s devbranch-to-devbranch? As the cores are WIP, I am content with the current procedures, but it doesn't feel ideal.