Autodesk: [hd] Allow passing HdRendererCreateArgs to CreateDelegate() so IsSupported() can work correctly

[erikaharrison-adsk]

Description of Change(s)

The main issue is that the IsSupported() call checks the default Hgi, which isn't necessarily what one is trying to use. If the default isn't supported, then you can't create a render delegate even if a non-default is supported. We've encountered an issue (Windows laptop) where HgiGL fails to create due to an OpenGL version problem, but HgiVulkan works. It should be possible to use HgiVulkan (non-default) even when HgiGL (default) doesn't work. This solution addresses this issue.

Note: You can set HGI_ENABLE_VULKAN to change the defaults, but that's not always an option, and isn't a proper solution as the environment variables are for development, not production.

Example use case: https://github.com/Autodesk/hydra-viewport-toolbox/blob/a24d055fcf0d146249afb7e6a693fd5763355ca0/source/engine/renderIndexProxy.cpp#L49-L56

Link to proposal (if applicable)

• N/A

Fixes Issue(s)

• N/A

Checklist

• I have created this PR based on the dev branch

• I have followed the coding conventions

• I have added unit tests that exercise this functionality (Reference:
  testing guidelines)

• I have verified that all unit tests pass with the proposed changes

• I have submitted a signed Contributor License Agreement (Reference:
  Contributor License Agreement instructions)

[jesschimein]

Filed as internal issue #USD-11704

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