Tests

[release-3.4] add test release makefile target #15804

Job	Run time
test (linux-amd64-integration-4-cpu)	9m 41s
test (linux-amd64-unit-4-cpu-race)	58s
test (linux-amd64-fmt)	55s
test (linux-amd64-integration-1-cpu)	10m 37s
test (linux-amd64-integration-2-cpu)	10m 7s
test (linux-amd64-grpcproxy)	15m 0s
test (linux-386-unit)	37s
test (linux-amd64-e2e)	14m 4s
test (all-build)	3m 32s
test (linux-amd64-functional)	8m 20s
	1h 13m 51s

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