Move getWorkspace() method from ResourceTest to utility class #903 #1500

Job	Run time
check-freeze-period / verify-freeze-period	5s
build / Upload Event File	2s
build / Verify Linux	11m 45s
build / Verify Windows	17m 42s
check-merge-commits / Block Merge Commits	8s
build / Verify MacOS	24m 37s
	54m 19s

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