Added the ability to set the VkMemoryDedicatedRequirements
structure in vkGetBufferMemoryRequirements2. Note that this
cl adds no support for dedicated allocations.

Passes all tests in the Tests section below.

Change-Id: Ib5bc2775e66e810d1ca2d52672eb2cca71e85f5e
Tests: dEQP-VK.api.buffer.dedicated_alloc.*
Tests: dEQP-VK.api.buffer_view.create.*
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/27290
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>