Linux wheels CI broken; h5py 3.16 will break wheels compatibility again

[crusaderky]

Our Linux wheels CI broke a few hours ago, due to the cibuildwheel images getting very recently upgraded (with the same name as before) to libhdf5 2.0.

This means that:

• We can't release a new versioned-hdf5 version with Linux wheels until h5py 3.16.0 comes out
• When it does come out, it will be pinned to depend on h5py >=3.16.0
• versioned-hdf5 2.2.1 Linux wheels are pinned against h5py >=3.15.0, but actually only work vs. h5py >=3.15.0,<3.16.0.
• This is just like versioned-hdf5 2.1.0 and older were pinned against h5py >=3.8.0, but the Linux wheels actually only work against h5py >=3.8.0,<3.15.0 (h5py 3.15 broke Linux wheels #466)

MacOS wheels, conda packages, and source installation are unaffected.

A more in detail analysis and discussion upstream: h5py/hdf5-manylinux#25