Adds Custom Profile Attributes API endpoints license check (#29906)

* Adds Custom Profile Attributes feature license and API endpoints check

* Fix linter

* Remove the specific license feature and fallback to checking for license presence

* Add translation

* Update the checks and tests to enable endpoints only for Enterprise licenses

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Co-authored-by: Mattermost Build <build@mattermost.com>

server/i18n/en.json

@@ -1837,6 +1837,10 @@
     "id": "api.custom_groups.no_remote_id",
     "translation": "remote_id must be blank for custom group"
   },
+  {
+    "id": "api.custom_profile_attributes.license_error",
+    "translation": "Your license does not support Custom Profile Attributes."
+  },
   {
     "id": "api.custom_status.disabled",
     "translation": "Custom status feature has been disabled. Please contact your system administrator for details."