[tempest] Cap Manila API microversion to 2.78 in tempest overrides

The manila-tempest-tests plugin in openstack-tempest-all:current-podified
auto-discovers its max supported microversion (2.85), but the Manila API
server (Antelope) only supports up to 2.78. This causes all tests using
the v2 client to fail with HTTP 406 during setUpClass/create_share_type.

Signed-off-by: Francesco Pantano <fpantano@redhat.com>

Author: fmount

scenarios/centos-9/ceph_backends.yml

@@ -43,5 +43,6 @@ cifmw_test_operator_tempest_tempestconf_config:
     share.run_share_group_tests false
     share.capability_storage_protocol cephfs
     share.suppress_errors_in_cleanup true
+    share.max_api_microversion 2.78
     service_available.swift false
     service_available.cinder true

scenarios/centos-9/hci_ceph_backends.yml

@@ -59,3 +59,4 @@ cifmw_test_operator_tempest_tempestconf_config:
     share.run_share_group_tests false
     share.capability_storage_protocol cephfs
     share.suppress_errors_in_cleanup true
+    share.max_api_microversion 2.78