'Test WHS' builder is broken since its 2330 build

Test WHS

From 1789 to 2330, which hung the builder for 2 months:
old builds, without actual logs (anymore?!).

–

2331:
succeeded.

From 2332 to 2369:
builder is broken again, as test task immediately fails.

rm: cannot remove 'C:\\tests': Device or resource busy

mv: cannot stat 'C:\\tests/rosautotest.exe': No such file or directory

program finished with exit code 1

elapsedTime=0.328000

–

2370:
succeeded.

2371:
same failure.