obs-outputs: Add Hybrid MOV support

[derrod]

Description

This PR extends the existing native MP4 muxer to also support MOV flavour output files.

This brings:

• ProRes support
• More widely supported way of recording H.264/HEVC + PCM (the MP4 PCM extension is relatively "new")
• Feature parity with FFmpeg output

Motivation and Context

Wanted to have the same benefits for macOS users that use ProRes or want to use MOV for compatbility with Mac software (e.g. Final Cut).

How Has This Been Tested?

Tested on Windows and my M1 Pro MacBook with ProRes, H.264, and HEVC video, as well as ALAC, PCM, and AAC audio

Types of changes

• New feature (non-breaking change which adds functionality)
• Tweak (non-breaking change to improve existing functionality)
• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master 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.