[MM-31745] Add translations for enterprise PR#1266 (#20872)

* Add certificate_parse_error's translation from enterprise

* Change translation text

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

i18n/en.json

@@ -7691,6 +7691,10 @@
     "id": "ent.saml.build_request.encoding.app_error",
     "translation": "An error occurred while encoding the request for the Identity Provider. Please contact your System Administrator."
   },
+  {
+    "id": "ent.saml.configure.certificate_parse_error.app_error",
+    "translation": "SAML could not load Identity Provider Public Certificate successfully, please contact your system administrator."
+  },
   {
     "id": "ent.saml.configure.encryption_not_enabled.app_error",
     "translation": "SAML login was unsuccessful because encryption is not enabled. Please contact your System Administrator."