[labqual] Making firmware_path required for running labqual_stable test.

BUG=b/363327568
TEST= Manual testing with lab DUT.

Change-Id: I8b97153b668ce9b1e11359f093bf811bee24d2b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/5829782
Commit-Queue: Gowri Denduluri <[email protected]>
Reviewed-by: Garry Wang <[email protected]>
Tested-by: Gowri Denduluri <[email protected]>
Reviewed-by: Xixuan Wu <[email protected]>
1 file changed