windows: testutils changes #1609

Job	Run time
Build Documentation	25s
Build and Lint	2m 19s
Run tests on arm64	43s
Run tests on previous stable Go	2m 39s
Run tests (Linux) (mainline)	2m 0s
Run tests (Windows) (main)	2m 14s
Run tests (Linux) (stable)	7m 5s
Run tests (Linux) (6.6)	1m 15s
Run tests (Linux) (6.1)	1m 25s
Run tests (Linux) (5.15)	1m 8s
Run tests (Linux) (5.10)	5m 58s
Run tests (Linux) (5.4)	1m 7s
Run tests (Linux) (4.19)	1m 47s
Run tests (Linux) (4.14)	1m 9s
Run tests (Linux) (4.9)	6m 28s
	37m 42s

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