feat(grpc-asyncio): bump grpcio version

Bump grpcio to latest version (1.66.1) to include both type hint
generation and asyncio support.

Also remove explicit dependency on protobuf and use it indirect
from grpcio to avoid version mismatch warnings.

.python-version

@@ -1 +1 @@
-3.8
+3.10

python/remotivelabs-broker/docker/build.sh

@@ -35,8 +35,7 @@ function generate_protobuf_files() {
     --proto_path=$PROTO_IN \
     --python_out=$PROTO_STUBS_OUT \
     --grpc_python_out=$PROTO_STUBS_OUT \
-    --mypy_out=$PROTO_STUBS_OUT \
-    --mypy_grpc_out=$PROTO_STUBS_OUT \
+    --pyi_out=$PROTO_STUBS_OUT \
     $PROTO_IN/*.proto
 
   # Note: protobuf compiler does not support generating relative or custom absolute imports for python. Use a script to do this manually...

python/remotivelabs-broker/misc/fix_import_statements.py

@@ -24,7 +24,6 @@
 
 # You can manually specify the number of replacements by changing the 4th argument
 for file in files:
-    print(f"fixing imports in file {file}")
     with open(file, encoding="utf-8") as stream:
         contents = stream.read()
         result = re.sub(REGEX_STRING, SUBSTITUTE_STRING, contents, count=0, flags=re.MULTILINE)