Port availability zones to core API

Changes:
- Register availability zones API as core API using old link.
- Remove extension code for availability zones.
- Leave rename of API url for future update which will be done with
  bump of microversion after port of all extensions to core API.

Partially implements bp ext-to-core

Change-Id: Ifc75ef2d16121634ad12e5e12960c928e4d24b90
1 file changed
tree: 9c4314bbdf31a1378bbffa28b7bf8521dab17391
  1. manila_tempest_tests/