Makefile uses archived rabbitmq-codegen repository

Describe the bug

Makefile uses the archived repository (https://github.com/rabbitmq/rabbitmq-codegen):

Lines 32 to 33 in 4b27d84

    
           $(DEPS_DIR)/rabbitmq_codegen: 
        
           	git clone https://github.com/rabbitmq/rabbitmq-codegen.git "$@"

Per the repo itself:

This was migrated to https://github.com/rabbitmq/rabbitmq-server

Reproduction steps

Run make
cd deps/rabbitmq_codegen
git show remote -v shows that the old repository is used

Expected behavior

The Makefile should use the new location at https://github.com/rabbitmq/rabbitmq-server.

Additional context

No response

While it can use that repo, I don't think Makefile is really used by the core team or release infrastructure. You can point codegen.dir to the rabbitmq_codegen location and Maven will pick it up.

But I have no objections to updating Makefile target.

The Makefile is one way to get the rabbitmq_codegen dependency easily (CI uses it), so I fixed it to use the directory from the broker repository.

	$(DEPS_DIR)/rabbitmq_codegen:
	git clone https://github.com/rabbitmq/rabbitmq-codegen.git "$@"