Update GitHub Actions workflows. (#595) #205

Job	Run time
prerequisites	2m 0s
lint / lint	27s
License Check / License Check	38s
generate_coverage_data	1m 47s
build_sdk (nodejs)	1m 29s
build_sdk (python)	1m 35s
build_sdk (dotnet)	1m 12s
build_sdk (go)	1m 42s
build_sdk (java)	1m 21s
test (nodejs)	2m 59s
test (python)	1m 37s
test (dotnet)	1m 33s
test (go)	1m 29s
test (java)	2m 6s
publish	6m 4s
publish_sdk	2m 15s
Tag release if labeled as needs-release	4s
	30m 18s

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