Remove old GRPC bash script and convert to python3 (#7454)

* Remove old GRPC bash script and convert to python3

* updated checking gRPC script to python3

scripts/check-grpc-generated-code.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+#
+# Copyright 2022 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.
+
+import subprocess
+import sys
+import generate_grpc_examples
+from pathlib import Path
+
+# Get the path where this script is located so we can invoke the script from
+# any directory and have the paths work correctly.
+script_path = Path(__file__).parent.resolve()
+
+# Get the root path as an absolute path, so all derived paths are absolute.
+root_path = script_path.parent.absolute()
+
+print("Generating GRPC code...")
+generate_grpc_examples.GenerateGRPCExamples()
+
+result = subprocess.run(["git", "diff", "--quiet"], cwd=root_path)
+
+if result.returncode != 0:
+    print(
+        "\n"
+        "ERROR: ********************************************************\n"
+        "ERROR: * The following differences were found after running   *\n"
+        "ERROR: * the script/generate_grpc_examples.py script. Maybe   *\n"
+        "ERROR: * you forgot to run it after making changes in a       *\n"
+        "ERROR: * generator or schema?                                 *\n"
+        "ERROR: ********************************************************\n"
+    )
+    subprocess.run(["git", "diff", "--binary", "--exit-code"], cwd=root_path)
+    sys.exit(result.returncode)