feat: add shenyu-registry-k8s module unit test #15575

Job	Run time
build (shenyu-integrated-test-grpc)	9m 29s
build (shenyu-integrated-test-apache-dubbo)	7m 3s
build (shenyu-integrated-test-https)	9m 32s
build (shenyu-integrated-test-motan)	9m 30s
build (shenyu-integrated-test-spring-cloud)	10m 22s
build (shenyu-integrated-test-websocket)	9m 0s
build (shenyu-integrated-test-rewrite)	9m 14s
build (shenyu-integrated-test-sofa)	10m 38s
build (shenyu-integrated-test-combination)	13m 6s
build (shenyu-integrated-test-sdk-http)	9m 1s
build (shenyu-integrated-test-sdk-apache-dubbo)	11m 5s
build (shenyu-integrated-test-http)	10m 47s
	1h 58m 47s

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