Respect `MACOSX_DEPLOYMENT_TARGET` in `--python-platform` (#3470) #11

Job	Run time
Determine changes	7s
cargo test \| ubuntu	1s
cargo test \| macos	4m 34s
cargo clippy \| ubuntu	1m 5s
build binary \| linux	1s
cargo clippy \| windows	1s
cargo fmt	21s
cargo test \| windows	1s
check windows trampoline	4m 45s
build binary \| macos x86_64	1s
build binary \| macos aarch64	1m 30s
build binary \| windows	1s
check system \| python on macos x86_64	0s
benchmarks	0s
check cache \| macos aarch64	12s
check system \| homebrew python on macos aarch64	20s
check system \| python on macos aarch64	14s
check system \| pypy on ubuntu	0s
check system \| alpine	0s
check system \| pyston	0s
check system \| python on opensuse	0s
check system \| python on rocky linux ${{ matrix.rocky-version }}	0s
ecosystem test \| ${{ matrix.repo }}	0s
check cache \| ubuntu	0s
check system \| python on debian	0s
check system \| python on ubuntu	0s
check system \| python on fedora	0s
check system \| python via pyenv	0s
check system \| amazonlinux	0s
check system \| python3.10 on windows x86	0s
check system \| python3.13 on windows	0s
check system \| python3.12 via chocolatey	0s
check system \| conda${{ matrix.python-version }} on ${{ matrix.os }}	0s
check system \| embedded python3.10 on windows	0s
check system \| python3.10 on windows	0s
	13m 14s

Provide feedback