What hit us was a regression in 2.2.0. The hack we landed only fixes one
URL (e.g. /v1/rules/ is still broken) and leaves some redundant code in place
around path handling. Werkzeug 2.2.1 fixes our problems.
Reverts commit 97f4e98d0b.
Story: #2010193
Task: #45904
Depends-On: https://review.opendev.org/c/openstack/requirements/+/851500
Change-Id: Ice7e9499fbb2585d353ece7c5fa30e425e92d362