This is an additional attempt to have more "smoke testing" in place for systems where there is no real 11_1 level driver present. (we already test for Shader Model 5.0 above, now also check this 11.1 feature indicating that VSSetConstantBuffers1 is actually implemented) This probing is important in particular for Qt Quick, where there is an automatic retry with the software (WARP) adapter when the initial QRhi::create() returns false. This may or may not help the virtual machine case in the associated issue, but is a valid check regardless since we absolutely require constant buffer offsetting. Task-number: QTBUG-78648 Pick-to: 6.5 6.4 6.2 Change-Id: I4d3c7b5c6c1f2b04b16c84b42c92651a3e671617 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Andy Nichols <andy.nichols@qt.io>