Update GitHub Actions workflows. (#481) #178

Job	Run time
prerequisites	2m 26s
lint / lint	23s
License Check / License Check	22s
generate_coverage_data	2m 2s
build_sdk (nodejs)	1m 12s
build_sdk (python)	1m 29s
build_sdk (dotnet)	1m 6s
build_sdk (go)	1m 17s
build_sdk (java)	1m 26s
test (nodejs)	3m 25s
test (python)	2m 9s
test (dotnet)	2m 1s
test (go)	2m 5s
test (java)	2m 4s
publish	9m 16s
publish_sdk	14m 46s
Tag release if labeled as needs-release	2s
	47m 31s

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