In Xcode 14.3, Apple modified the OS versions which support these
three types to exclude iOS 11 and watchOS 4. Update abseil accordingly.

Those versions of the OS did _not_ actually support the types, and any
binaries which used these types, built with prior Xcode versions,
would've crashed on startup on an actual iOS 11 or watchOS 4 device
due to missing symbols. As of Xcode 14.3, using them is now, correctly,
a build failure.

This change also drops the conditionals for pre-Xcode 12.5, as that is
no longer a supported version.

PiperOrigin-RevId: 546005629
Change-Id: Ib0430307ac2ada4910f07c54cfd6e99db8ca1905