[vulkan] Add Windows RenderDoc DLL search path and log capture path
[vulkan] Add Windows RenderDoc DLL search path and log capture path

On Windows RenderDoc is installed at C:/Program Files/RenderDoc
by default. Add that path into the renderdoc.dll search path.

Also let RenderDoc log its capture path so it's easier to find
out.

Closes https://github.com/google/iree/pull/2131

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/iree/pull/2131 from antiagainst:renderdoc-log f31bb574d1e73e19d0e66c49199458f1e3befda1
PiperOrigin-RevId: 315361811

iree-org/iree,google/iree,google/iree,iree-org/iree,iree-org/iree,google/iree,google/iree,google/iree,iree-org/iree,iree-org/iree,google/iree,iree-org/iree,iree-org/iree,google/iree