MacOS arm64 wheels incompatible with earlier MacOS versions

[cqc-alec]

This is a blocker for the 1.27 release.

The build script that we use to build MacOS arm64 versions overrides the platform name to ensure compatibility with MacOS 12.0 or later:

tket/pytket/setup.py

Line 173 in 3bd8f04

self.plat_name = plat_name

Afterwards we run delocate-wheel on the CI.

Versions of delocate prior to 0.11.0 respected this platform name. However, that version does not. Apparently it performs some checks that the wheel is valid for that platform and renames it if it thinks it isn't: see matthew-brett/delocate#214 . This is happening for pytket wheels.