UI: Enable browser hw accel toggle under Linux

[tytan652]

Description

Depends on:

• https://github.com/obsproject/obs-studio/pull/11219
• https://github.com/obsproject/obs-browser/pull/453

Enable browser hw accel toggle under Linux

Motivation and Context

Add toggle for hwaccel support under Linux

How Has This Been Tested?

Set the checkbox to true and the feature was enabled, and then set to false and it got disabled.

Types of changes

• New feature (non-breaking change which adds 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.
• [x] 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.