Merge pull request #4053 from mattcary/pdcsi-v1.7.3

gcp-compute-persistent-disk-csi-driver v1.7.3

Author: k8s-ci-robot

k8s.gcr.io/images/k8s-staging-cloud-provider-gcp/images.yaml

@@ -2,6 +2,7 @@
   dmap:
     "sha256:23d2fe20c5307c3ef2580ed035084d9a57866717bd8b80bdc2dabd2097591227": ["v1.2.1"]
     "sha256:2d920e96444596fbeb3c8ebee2197bdebbaf6a1aacb02516f95bf6794f3fea58": ["v1.2.4"]
+    "sha256:3300f58bdfffad21294703d7e856a14ef3561b6cfb057f58a82cb1dd24d3c5f5": ["v1.7.3"]
     "sha256:60c31b6b1f5e18e14e8f9be312afbad67ff5c46785e01e99d2ee3fb815a3c29c": ["v1.3.3"]
     "sha256:7d20ed9af18c24b68b6afe715aeb539fd9c352af875d8329df4652bd0bc38ea8": ["v1.2.3"]
     "sha256:8e04ffa8060e46b5e07d70990f80ad15446b2f27b286df4a47569e1c818dcce7": ["v1.3.0"]