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/generate_grpc_examples.py

@@ -0,0 +1,70 @@
+#!/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.
+
+from util import flatc, root_path
+from pathlib import Path
+
+grpc_examples_path = Path(root_path, "grpc/examples")
+
+greeter_schema = Path(grpc_examples_path, "greeter.fbs")
+
+COMMON_ARGS = [
+    "--grpc",
+    "--bfbs-filenames",
+    str(grpc_examples_path),
+]
+
+def GenerateGRPCExamples():
+
+    flatc(
+        COMMON_ARGS
+        + [
+            "--go",
+        ],
+        schema=greeter_schema,
+        cwd=Path(grpc_examples_path, "go/greeter"),
+    )
+
+    flatc(
+        COMMON_ARGS
+        + [
+            "--python",
+        ],
+        schema=greeter_schema,
+        cwd=Path(grpc_examples_path, "python/greeter"),
+    )
+
+    flatc(
+        COMMON_ARGS
+        + [
+            "--swift",
+            "--gen-json-emit",
+        ],
+        schema=greeter_schema,
+        cwd=Path(grpc_examples_path, "swift/Greeter/Sources/Model"),
+    )
+
+    flatc(
+        COMMON_ARGS
+        + [
+            "--ts",
+        ],
+        schema=greeter_schema,
+        cwd=Path(grpc_examples_path, "ts/greeter/src"),
+    )
+
+if __name__ == "__main__":
+    GenerateGRPCExamples()