[MM-41576] Revamp database schema version (#19586)

* revamp db version and add applied migrations endpoint

* replace old schema version with new

* add db version subcommand

* add to local api

* reflect review comments

* log errors

* remove setting the version from model.CurrentVersion

* fix a test

store/timerlayer/timerlayer.go

@@ -10616,10 +10616,6 @@ func (s *TimerLayer) DropAllTables() {
 	s.Store.DropAllTables()
 }
 
-func (s *TimerLayer) GetCurrentSchemaVersion() string {
-	return s.Store.GetCurrentSchemaVersion()
-}
-
 func (s *TimerLayer) LockToMaster() {
 	s.Store.LockToMaster()
 }