feat: enlarge e2e parallel level to 4

Signed-off-by: jerryzhuang <[email protected]>

Author: zhuangqh

Makefile

@@ -107,7 +107,7 @@ inference-api-e2e:
 # Ginkgo configurations
 GINKGO_FOCUS ?=
 GINKGO_SKIP ?=
-GINKGO_NODES ?= 2
+GINKGO_NODES ?= 4
 GINKGO_NO_COLOR ?= false
 GINKGO_TIMEOUT ?= 120m
 GINKGO_ARGS ?= -focus="$(GINKGO_FOCUS)" -skip="$(GINKGO_SKIP)" -nodes=$(GINKGO_NODES) -no-color=$(GINKGO_NO_COLOR) -timeout=$(GINKGO_TIMEOUT)