Fix migration scripts (#18756)

* Fix migration scripts

Set the DB schema version in DB prior to running migration

https://community-daily.mattermost.com/boards/workspace/zyoahc9uapdn3xdptac6jb69ic/285b80a3-257d-41f6-8cf4-ed80ca9d92e5/495cdb4d-c13a-4992-8eb9-80cfee2819a4?c=c2525dbb-23eb-4fe7-8fb4-e9a5f503dc8c

```release-note
NONE
```

* Revert schema to 6.0.0 and update CI scripts

* Fix typo

* Add missing default

* Fix extra comma

Co-authored-by: Claudio Costa <cstcld91@gmail.com>

Makefile

@@ -353,12 +353,12 @@ test-compile: ## Compile tests.
 	done
 
 test-db-migration: start-docker ## Gets diff of upgrade vs new instance schemas.
-	./scripts/mysql-migration-test.sh 6.0
-	./scripts/psql-migration-test.sh 6.0
+	./scripts/mysql-migration-test.sh 6.0.0
+	./scripts/psql-migration-test.sh 6.0.0
 
 test-db-migration-v5: start-docker ## Gets diff of upgrade vs new instance schemas.
-	./scripts/mysql-migration-v5-test.sh 5.0
-	./scripts/psql-migration-v5-test.sh 5.0
+	./scripts/mysql-migration-test.sh 5.0.0
+	./scripts/psql-migration-test.sh 5.0.0
 
 gomodtidy:
 	@cp go.mod go.mod.orig