upload csiproxy binary to gcs with version information

add logic to upload binary to gcs with version information

Author: jingxu97

.cloudbuild.sh

@@ -5,5 +5,4 @@
 # Extract tag-n-hash value from GIT_TAG (form vYYYYMMDD-tag-n-hash) for REV value.
 REV=v$(echo "$GIT_TAG" | cut -f3- -d 'v')
 
-run_with_go "${CSI_PROW_GO_VERSION_BUILD}" make build REV="${REV}"
-cp bin/csi-proxy.exe bin/csi-proxy-"${PULL_BASE_REF}".exe
+run_with_go "${CSI_PROW_GO_VERSION_BUILD}" make build REV=${REV}

cloudbuild.yaml

@@ -27,6 +27,6 @@ substitutions:
   _PULL_BASE_REF: 'master'
 artifacts:
   objects:
-    location: 'gs://k8s-staging-sig-storage/csi-proxy'
-    paths: 'bin/csi-proxy-${_PULL_BASE_REF}.exe'
+    location: 'gs://k8s-staging-sig-storage/csi-proxy/${_PULL_BASE_REF}'
+    paths: 'bin/csi-proxy.exe'