qutip installation is slow in Create Docker images (multiplat)

[1tnguyen]

In Create Docker images (multiplat) build, qutip installation took quite a while as it is building from source.

#38 258.5 Building wheels for collected packages: qutip
#38 258.5   Building wheel for qutip (pyproject.toml): started
#38 332.4   Building wheel for qutip (pyproject.toml): still running...
#38 478.4   Building wheel for qutip (pyproject.toml): still running...
#38 593.5   Building wheel for qutip (pyproject.toml): still running...
#38 661.1   Building wheel for qutip (pyproject.toml): still running...
#38 724.9   Building wheel for qutip (pyproject.toml): still running...
#38 815.8   Building wheel for qutip (pyproject.toml): still running...
#38 910.3   Building wheel for qutip (pyproject.toml): still running...
#38 1005.4   Building wheel for qutip (pyproject.toml): still running...

This is because qutip doesn't have wheels for Linux ARM64.
We could build and cache this somewhere to speed up the build.