feat: release rdbms on staging (#44576)

fix: unhide cert from settings page

fix: add cert variables where missing

fix: show token on settings page

feat: add challenges to certified user data

fix: stylize settings page a little bit

fix: only show rdbms when upcomingChanges = true

fix: relational databases -> relational database

api-server/src/common/models/user.json

@@ -200,6 +200,11 @@
       "description": "Camper is machine learning with Python certified",
       "default": false
     },
+    "isRelationalDatabaseCertV8": {
+      "type": "boolean",
+      "description": "Camper is relational database certified",
+      "default": false
+    },
     "completedChallenges": {
       "type": [
         {