delete kind cluster after tests run

Signed-off-by: Mucahit Kurt <mucahitkurt@gmail.com>

release-tools/prow.sh

@@ -579,7 +579,12 @@ EOF
     KUBECONFIG="$(kind get kubeconfig-path --name=csi-prow)"
     export KUBECONFIG
 }
-
+# Deletes kind cluster
+delete_cluster() {
+    if kind get clusters | grep -q csi-prow; then
+        run kind delete cluster --name=csi-prow || die "kind delete failed"
+    fi
+}
 # Looks for the deployment as specified by CSI_PROW_DEPLOYMENT and CSI_PROW_KUBERNETES_VERSION
 # in the given directory.
 find_deployment () {
@@ -1017,6 +1022,7 @@ main () {
                     fi
                 fi
             fi
+            delete_cluster
         fi
 
         if tests_need_alpha_cluster && [ "${CSI_PROW_E2E_ALPHA_GATES}" ]; then
@@ -1047,6 +1053,7 @@ main () {
                     fi
                 fi
             fi
+            delete_cluster
         fi
     fi