Fix invalid layout transitions in some dynamic rendering tests

Fix invalid layout transitions in some dynamic rendering tests

Some of the dynamic rendering tests do an image layout transition
from uninitialized when the image is already in use. This can lead
to corruption of the image content.

This CL removes an unnecessary barrier from the
dEQP-VK.multiview.dynamic_rendering.readback* tests and fixes
a barrier with the dEQP-VK.multiview.dynamic_rendering.depth.*
and dEQP-VK.multiview.dynamic_rendering.stencil.* tests.

Affects:

dEQP-VK.multiview.dynamic_rendering.depth.*
dEQP-VK.multiview.dynamic_rendering.stencil.*
dEQP-VK.multiview.dynamic_rendering.readback*

Components: Vulkan

VK-GL-CTS issue: 3164

Change-Id: Ib0847839528909337001d32bbde59c7e979ec9e9