libobs-d3d11: Disable HAGS workaround for NVIDIA driver >= 536.99

[derrod]

Description

Disables the HAGS workaround previously introduced in 9de6b18d5c5281cfa05ff64f2285ba53b4f5d688 for drivers versions where the crashing issues supposedly is fixed.

Motivation and Context

Restore previous behaviour if HAGS is enabled.

How Has This Been Tested?

TBD

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

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