deps.qt: Remove Qt5 and update Qt6 build scripts

[PatTheMav]

Description

Removes Qt5 builds and simplifies Qt6 build matrix to only provide the following builds:

• macOS Universal (Release + dSYMs)
• Windows x64 (RelWithDebInfo + PDBs)

Motivation and Context

Improve CI efficiency and simplify build matrix for OBS Studio builds.

How Has This Been Tested?

Built Qt6 on Windows 11 for x64 and arm64.

Types of changes

• 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.

[derrod]

With cmake 3.0, will we still need 32 bit deps for the remaining 32 bit components (game capture, vcam, etc.) or could they be stripped down further?

[PatTheMav]

With cmake 3.0, will we still need 32 bit deps for the remaining 32 bit components (game capture, vcam, etc.) or could they be stripped down further?

That's implemented in #174.

[RytoEX]

Nit.

[RytoEX]

CI: Remove Qt5 and not longer needed architectures from Qt builds

not -> no

Some questions, some nits.

Local compile tests worked.

[PatTheMav]

Down to nits. Will test locally shortly.

I noticed that there is scheduled.yaml, but the other files are all .yml. GitHub seems to go with .yml. Is there a particular reason for using .yaml there?

IIRC the standard suggests using yaml by default and I think that's what Sublime Text uses by default. I intend to move all files to yaml at some point anyway, but this just fell through the cracks.

[RytoEX]

Some of the commits are bit heavier or more entangled with other changes than I prefer (sometimes with cosmetic changes), but it's probably more work than it's worth to split this up further or reorganize the commits. Looks good to me otherwise, and local testing showed no further issues when building with these artifacts.