tu: Implement VK_KHR_maintenance6
What does this MR do and why?
*maintenance6*
Test run totals:
Passed: 173/657 (26.3%)
Failed: 0/657 (0.0%)
Not supported: 484/657 (73.7%)
Warnings: 0/657 (0.0%)
Waived: 0/657 (0.0%)
Edited by Valentine Burley