Revert "[rocky] Define keystone domain for heat stack"

The keystone client doesn't work fully with domains yet.
Get back when it is resolved

Related-Prod: PROD-26573

This reverts commit 6547d4d3a7e16565f40536bb34c0d1339b363cdb.

Change-Id: I1a6b98793587b65633c8d5c56f7f60c9228c1fb4
1 file changed