Run Unit tests for all branches again

We limited because of the number of minutes but as we're close to
migrating away from GitLab this is the easier fix for the current
deprecation issue.

gitlab/ci/unit.yml

@@ -29,21 +29,12 @@
         - unit-tests.xml
 
 run unit tests:
-  only:
-    - main
-    - /^[0-9].[0-9]$/
   extends: [.mariadb_job,.phpsupported_job,.unit_job]
 
 run unit tests (PR):
-  except:
-    - main
-    - /^[0-9].[0-9]$/
   extends: [.mariadb_job,.phpsupported_job_pr,.unit_job]
 
 run unit tests (MySQL):
-  only:
-    - main
-    - /^[0-9].[0-9]$/
   extends: [.mysql_job,.unit_job]
   parallel:
     matrix: