fix load of nvidia video fx

[summeroff]

Description

Motivation and Context

Plugin loading issues:

• It failed to check directx version as graphics is not initialized yet. Can skip check.
• There is no cudart64_100.dll file in SDK anymore. We do not even need it.

Similar changes already has been done in obs version of plugin.

How Has This Been Tested?

Make local build where filter works.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the streamlabs branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.