Add use_tls option for interop tests

tonic-interop/test.sh

@@ -12,7 +12,7 @@ esac
 SERVER="tonic-interop/bin/server_${OS}_amd64"
 
 # run the test server
-./"${SERVER}" &
+./"${SERVER}" $1 &
 SERVER_PID=$!
 echo ":; started grpc-go test server."
 
@@ -23,4 +23,4 @@ trap 'echo ":; killing test server"; kill ${SERVER_PID};' EXIT
  cargo run -p tonic-interop --bin client -- \
  --test_case=empty_unary,large_unary,client_streaming,server_streaming,ping_pong,\
 empty_stream,status_code_and_message,special_status_message,unimplemented_method,\
-unimplemented_service,custom_metadata
+unimplemented_service,custom_metadata $1