Update GitHub Actions workflows. (#286) #129

Job	Run time
prerequisites	47s
lint / lint	2m 19s
License Check / License Check	28s
build_sdk (nodejs)	1m 2s
build_sdk (python)	1m 8s
generate_coverage_data	47s
build_sdk (dotnet)	1m 22s
build_sdk (go)	1m 2s
build_sdk (java)	1m 19s
test (nodejs)	1m 39s
test (python)	1m 27s
test (dotnet)	1m 25s
test (go)	1m 9s
test (java)	1m 12s
publish	4m 20s
publish_sdk	14m 47s
Tag release if labeled as needs-release	3s
	36m 16s

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