Creating a UIImageView outside a view hierarchy now crashes on iOS 18. We can
avoid this offscreen rendering technique by removing UIImage.asTintedImage(),
configuring the tint colour and template rendering on the UIImage directly, and
rendering with UIGraphicsImageRenderer instead of lower-level Core Graphics
APIs.
OWSMath.swift overlaps somewhat with Math+OWS.swift but no worse than
OWSMath.h did previously. There are future refactoring efforts that
should occur there to use more of the extensions of Math+OWS.swift and
less of the extensions from OWSMath.swift
This included:
- Removing unavailable inits wholesale if no longer `required`
- Marking a few classes `final` so they could continue using
`Self(...)` rather than `OWSWhatever(...)`
