[GO] Tries to add go format to the CI (#6518)

* Trys to add go format to the CI

Adds Gofmt to CI

* Adds formatting for go dir in grpc

* Small fix

grpc/examples/go/format.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+#
+# Copyright 2021 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+
+format_greeter() {
+  cd greeter
+
+  # Format client
+  cd client
+  gofmt -w .
+  cd ..
+
+  # Format server
+  cd server
+  gofmt -w .
+  cd ..
+
+  cd ..
+}
+
+format_greeter