Missing validation if renderpass output is used as input attachment but not mapped with `vkCmdSetRenderingInputAttachmentIndices`

For details, please see this internal Vulkan issue: https://gitlab.khronos.org/vulkan/vulkan/-/issues/4687#note_591358

TL;DR is:

* Shader uses input attachment with `input_attachment_index=A, binding=B`
* Depth attachment's image view is bound to `binding=B` as input attachment
* `vkCmdSetRenderingInputAttachmentIndices` is _not_ used to map the depth attachment to input attachment
* Depth write is enabled

This is supposed to be invalid due to https://docs.vulkan.org/spec/latest/chapters/renderpass.html#renderpass-feedbackloop.

To reproduce, you can run the new tests in https://gerrit.khronos.org/c/vk-gl-cts/+/19613/1 (Note: take patchset 1, where I forgot to call `vkCmdSetRenderingInputAttachmentIndices`. Patchset 2 and later fix this test bug) and observe that syncval does not complain.