ci: use W3C-compliant Sauce Labs tunnelName and remove deprecated tun… #2243

Job	Run time
list	38s
workflow (devkit-core-tests-rerun)	43s
workflow (build-cli)	35s
workflow (modules-builder-tests)	37s
workflow (devkit-core-tests)	50s
workflow (build-unit-tests)	44s
	4m 7s

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