(CAT-2381) Puppetcore update

A set of changes dedicated to implementing puppetcore into our modules.
This update, amongst other changes, removes Puppet 7 support.

Author: LukasAud

metadata.json

@@ -80,7 +80,7 @@
   "requirements": [
     {
       "name": "puppet",
-      "version_requirement": ">= 7.0.0 < 9.0.0"
+      "version_requirement": ">= 8.0.0 < 9.0.0"
     }
   ],
   "description": "MySQL module",