Bug#35189564: hypergraph_optimizer switch is not set to its Default value

Post-push fix.

When obsoleting the ER_WARN_HYPERGRAPH_EXPERIMENTAL warning, the ER_
prefix was lost. This makes the macro still defined in the generated
include/mysqld_error.h.

Fixed by using the correct name in share/messages_to_clients.txt.

Change-Id: I83fab7d4e4dc7b962d4ebe7dbdaf6916936d1b42

Author: kahatlen

share/messages_to_clients.txt

@@ -9464,7 +9464,7 @@ ER_INVALID_CAST
 ER_HYPERGRAPH_NOT_SUPPORTED_YET 42000
   eng "The hypergraph optimizer does not yet support '%s'"
 
-OBSOLETE_WARN_HYPERGRAPH_EXPERIMENTAL
+OBSOLETE_ER_WARN_HYPERGRAPH_EXPERIMENTAL
   eng "The hypergraph optimizer is highly experimental and is meant for testing only. Do not enable it unless you are a MySQL developer."
 
 ER_DA_NO_ERROR_LOG_PARSER_CONFIGURED