Backport !5751 - Proto/Ghostnet: reduce `cycles_per_voting_period` to 1 cycle
Context
!5751 (merged) is required in protocol Kathmandu. Cherry-picked commit from it using the following commands.
$ git checkout -b proto-k-backport-5751
$ git cherry-pick 5cd9067c2c8a52a9da18f398815e28c130936c84
Manually testing the MR
Check CI.