Don't use class attributes for mutable workflow state #1037

Job	Run time
build-java (ubuntu-latest)	34s
build-go (ubuntu-latest)	7s
build-python (ubuntu-latest)	24s
build-dotnet (ubuntu-latest)	12s
build-ts (ubuntu-latest)	23s
latest-sdk-versions	1s
feature-tests-go / test	2m 25s
feature-tests-dotnet / test	1m 23s
feature-tests-java / test	1m 54s
feature-tests-python / test	1m 15s
feature-tests-ts / test	1m 52s
build-docker-images / build-dotnet-docker-images / Build cs docker image	1m 58s
build-docker-images / build-go-docker-images / Build go docker image	2m 14s
build-docker-images / build-java-docker-images / Build java docker image	2m 45s
build-docker-images / build-python-docker-images / Build py docker image	2m 17s
build-docker-images / build-ts-docker-images / Build ts docker image	3m 0s
	22m 44s

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