[PATCH] d3d10core/tests: Don't test stencil_ref again if it wasn't touched

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=104218

Your paranoid android.


=== debian11 (32 bit Hindi:India report) ===

Report validation errors:
d3d10core:d3d10core is missing some skip messages