extras: add vllm,bark,vall-e-x tests, bump diffusers (#1422)

* tests: add vllm

Signed-off-by: Ettore Di Giacinto <mudler@users.noreply.github.com>

* tests: Add vall-e-x tests

* Add bark tests

* bump diffusers

---------

Signed-off-by: Ettore Di Giacinto <mudler@users.noreply.github.com>

backend/python/vllm/Makefile

@@ -9,3 +9,9 @@ run:
 	@echo "Running vllm..."
 	bash run.sh
 	@echo "vllm run."
+
+.PHONY: test
+test:
+	@echo "Testing vllm..."
+	bash test.sh
+	@echo "vllm tested."