MM-9779: Incorporate a Token into the invitations system (#8604)

* Incorporate a Token into the invitations system

* Adding unit tests

* Fixing some api4 client tests

* Removing unnecesary hash validation

* Change the Hash concept on invitations with tokenId

* Not send invitation if it wasn't able to create the Token

* Fixing some naming problems

* Changing the hash query params received from the client side

* Removed unneded data param in the token usage

i18n/en.json

@@ -2851,8 +2851,8 @@
     "translation": "Encountered an issue joining default channels user_id=%s, team_id=%s, err=%v"
   },
   {
-    "id": "api.user.create_user.missing_hash_or_data.app_error",
-    "translation": "Missing Hash or URL query data."
+    "id": "api.user.create_user.missing_token.app_error",
+    "translation": "Missing Token."
   },
   {
     "id": "api.user.create_user.missing_invite_id.app_error",