Add image cache client

Depends-On: https://review.opendev.org/c/openstack/glance/+/842070
Change-Id: Idecb129d0ca96eb44c16f4e682b441a61cab42fb
diff --git a/releasenotes/notes/add-image-cache-apis-as-tempest-clients-fbcd186927a85e2f.yaml b/releasenotes/notes/add-image-cache-apis-as-tempest-clients-fbcd186927a85e2f.yaml
new file mode 100644
index 0000000..38cc9ac
--- /dev/null
+++ b/releasenotes/notes/add-image-cache-apis-as-tempest-clients-fbcd186927a85e2f.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The following ``image_cache`` tempest client for glance v2 image
+    caching API is implemented in this release.
+