Merge changes I61bcc949,I64c54ee4,I4d984d4c,I6186cd17,I953d0264, ...

* changes:
  Merge in changes from Khronos Vulkan CTS repository
  Merge branch '268-command-buffers-memory-leak-fix' into 'master'
  Merge branch '267-spirv_assembly.instruction-Fixes' into 'master'
  Removed correct code by mistake, adding that back and back out the originally intended code.
  CommandPool creations in some tests are fixed.
  Apply formating fixes Remove ArrayStride code.
  OpSelect's condition operand didn't follow spec OpSelect's condition operand should have same component number as OpSelect's result type.
  spirv_assembly.instruction.compute.opcopymemory.* Add 2 missed ArrayStride, array type in uniform/storage block must have their stride explicitly specified, otherwise the stride infomation in block layout is lost.