fix: Restore LoadWICFile for Windows due to incomplete cross-platform functionality

[Basewq]

PR Details

Partial revert of #2314 and #2338 for Windows to allow loading non-32-bit pixel formats.

Note that (as far as I'm aware) DxtWrapper.dll for Windows was not rebuilt with the 'dxtLoadWICFile' function removed, so it also means it does not need to be rebuilt for this revert.

Related Issue

Problem raised in #2376.
Technically it only fixes it for Windows, but the issue will persist for the non-Windows editor (which doesn't exist yet) and will require implementation/alternative solution if the intention is to remove it again.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.

[Eideren]

Looks good, thanks !