tests:Test srcAccessMask/srcStageMask conflict
tests:Test srcAccessMask/srcStageMask conflict

New test case for VALIDATION_ERROR_1b800940.
Create srcAccessMask conflict with srcStageMask in memory barrier.

Fix a bunch of existing test cases that were triggering this new
check b/c srcStageMask conflicted w/ barrier srcAccessMask.

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools