Make "Stateless" mode sessionless #837

Job	Run time
build (windows-latest, Release)	6m 36s
build (windows-latest, Debug)	6m 11s
build (macos-latest, Debug)	3m 28s
build (ubuntu-latest, Debug)	4m 24s
build (ubuntu-latest, Release)	3m 58s
build (macos-latest, Release)	4m 45s
publish-coverage	0s
	29m 22s

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