Make Noah the codeowner for permissions et al (#40919)

* Make Noah the codeowner for permissions et al

et al = `integrations` (OSS google auth, LDAP and Slack integrations) + `enterprise` (audit, advanced SSO, advanced config stuff).  `enterprise` also has LLM which doesn't really have a codeowner now, but it also doesn't need one.

* Correct the paths and the scopes

.github/CODEOWNERS

 src/metabase @camsaul
 modules @camsaul
 enterprise/backend @camsaul
+enterprise/backend/src/metabase_enterprise/advanced_permissions @noahmoss
+enterprise/backend/src/metabase_enterprise/audit_app @noahmoss
+enterprise/backend/src/metabase_enterprise/sso @noahmoss
+enterprise/backend/src/metabase_enterprise/task/truncate_audit_table.clj @noahmoss
+enterprise/backend/src/metabase_enterprise/internal_user.clj @noahmoss
+src/metabase/**/*permissions* @noahmoss
+src/metabase/integrations @noahmoss