chore: add Metrics in FlightMetadata (#134)

* chore: add metrics to metadata

* chore: update metrics to message

* chore: change string to bytes for backward compatibility

* chore: rebase main

Makefile

@@ -8,7 +8,7 @@ rust:
 	cargo build
 
 go: go-deps
-	docker run -t -w /greptime-proto \
+	docker run --rm -t -w /greptime-proto \
 		--entrypoint ./scripts/generate-go.sh \
 		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}
 
@@ -16,11 +16,11 @@ go-deps:
 	go mod download
 
 java:
-	docker run -t -w /greptime-proto \
+	docker run --rm -t -w /greptime-proto \
 		--entrypoint ./scripts/generate-java.sh \
 		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}
 
 cpp:
-	docker run -t -w /greptime-proto \
+	docker run --rm -t -w /greptime-proto \
 		--entrypoint ./scripts/generate-cpp.sh \
 		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}