microsoft/clc: Minor fixes
Now that we have Server 2022 we have a bunch of WARP fixes that were preventing us from running some tests, so light up some of those. Only a few left are disabled and probably need to be re-investigated. Also fix a test double free that was exposed when one of these disabled tests failed.
Also fix unused image arguments - these are broken ever since nir_var_image
was introduced, causing https://github.com/microsoft/OpenCLOn12/issues/20 and https://github.com/microsoft/OpenCLOn12/issues/35.