Review Platform Tiers

[IvanIsCoding]

In short, everything described in https://github.com/Qiskit/rustworkx/pull/1371#issuecomment-2629629721:

* win32 got removed from Qiskit and I think it should be removed from rustworkx
* aarch64 manylinux could be promoted to tier 1
* aarch64 musllinux could be promoted to tier 2 to include tests
* i686 was the slowest step in the release last time, I am inclined not to downgrade the tier as NumPy does not release binaries for it anymore

The current tier are available at https://www.rustworkx.org/install.html

In addition, it would be good to simplify the behaviour to not depend on Python version. Because we only support 3.9+, anything that applies to 3.10+ means 3.9 is treated differently