Update GitHub Actions workflows. (#330) #118

Job	Run time
prerequisites	2m 31s
lint / lint	2m 51s
License Check / License Check	1m 37s
generate_coverage_data	3m 26s
build_sdk (nodejs)	1m 37s
build_sdk (python)	1m 45s
build_sdk (dotnet)	1m 30s
build_sdk (go)	1m 48s
build_sdk (java)	2m 0s
test (nodejs)	2m 39s
test (python)	3m 44s
test (dotnet)	2m 12s
test (go)	2m 20s
test (java)	3m 31s
publish	7m 59s
publish_sdk	3m 56s
Tag release if labeled as needs-release	2s
	45m 28s

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