Move test_restore_server_invalid_state test to admin test

Nova is changing the RBAC policy default for deffered deleted
API form member-or-admin to manager-or-admin[1] and for that
test_restore_server_invalid_state needs to be tested with admin
client ohterwise it fail[2]. There is no change in test logic except
it is tested with admin client to perform the test objective.

[1] https://review.opendev.org/c/openstack/nova/+/941347
[2] https://0ccc316b4109089131e3-45dd8d096407cabbe1019de430c921aa.ssl.cf2.rackcdn.com/941347/1/check/tempest-integrated-compute/4c25539/testr_results.html

Change-Id: Ied10361920ef08d879e539a3ada3228b40b37150
2 files changed