make: always generate proto files sans rust

Generating the msggen proto files doesn’t require rust (even though it generates rust files).

Changelog-None

Makefile

@@ -363,7 +363,8 @@ ifneq ($(FUZZING),0)
 endif
 ifneq ($(RUST),0)
 	include cln-rpc/Makefile
-	include cln-grpc/Makefile
+endif
+include cln-grpc/Makefile
 
 $(MSGGEN_GENALL)&: doc/schemas/*.request.json doc/schemas/*.schema.json
 	PYTHONPATH=contrib/msggen $(PYTHON) contrib/msggen/msggen/__main__.py
@@ -386,7 +387,6 @@ $(GRPC_GEN)&: cln-grpc/proto/node.proto cln-grpc/proto/primitives.proto
 	$(PYTHON) -m grpc_tools.protoc -I cln-grpc/proto cln-grpc/proto/primitives.proto --python_out=$(GRPC_PATH)/ --experimental_allow_proto3_optional
 	find $(GRPC_DIR)/ -type f -name "*.py" -print0 | xargs -0 sed -i'.bak' -e 's/^import \(.*\)_pb2 as .*__pb2/from pyln.grpc import \1_pb2 as \1__pb2/g'
 	find $(GRPC_DIR)/ -type f -name "*.py.bak" -print0 | xargs -0 rm -f
-endif
 
 # We make pretty much everything depend on these.
 ALL_GEN_HEADERS := $(filter %gen.h,$(ALL_C_HEADERS))