rabbitmq_cli: Create a symlink to test node's logs

[Why]
This doesn't replicate the common_test logs layout, but it will be good
enough to let our GitHub Actions workflow to upload the logs without
specific instructions in the workflow.

Author: dumbbell

deps/rabbitmq_cli/.gitignore

@@ -1 +1,2 @@
 /deps/
+/logs

deps/rabbitmq_cli/Makefile

@@ -123,7 +123,11 @@ tests:: escript test-deps
 	$(verbose) $(MAKE) -C ../../ install-cli
 	$(verbose) $(MAKE) -C ../../ start-background-broker \
 		PLUGINS="rabbitmq_federation rabbitmq_stomp rabbitmq_stream_management amqp_client" \
-		$(if $(filter khepri,$(RABBITMQ_METADATA_STORE)),,RABBITMQ_FEATURE_FLAGS="-khepri_db")
+		$(if $(filter khepri,$(RABBITMQ_METADATA_STORE)),,RABBITMQ_FEATURE_FLAGS="-khepri_db"); \
+		rm -f logs; \
+		log_dir=$$(../../sbin/rabbitmqctl eval 'io:format("~s~n", [maps:get(log_base_dir,rabbit_prelaunch:get_context())]).'); \
+		log_dir=$$(echo "$$log_dir" | head -n 1); \
+		ln -s "$$log_dir" logs
 	$(gen_verbose) $(MIX_TEST) \
 		$(if $(RABBITMQ_METADATA_STORE),--exclude $(filter-out $(RABBITMQ_METADATA_STORE),khepri mnesia),) \
 		$(TEST_FILE); \
@@ -160,7 +164,7 @@ endif
 clean:: clean-mix
 
 clean-mix:
-	$(gen_verbose) rm -f $(ESCRIPT_FILE) $(LINKED_ESCRIPTS)
+	$(gen_verbose) rm -f $(ESCRIPT_FILE) $(LINKED_ESCRIPTS) logs
 	$(verbose) echo y | mix clean
 
 format: