Pyodide 0.24.0 release

Pyodide 0.24 is a major release focused on fine tuning public APIs and
performance. It includes a major rework of the streams APIs to be faster and
more flexible. We increased the consistency of the foreign function interface.
We also added micropip support for the Python simple repository API.

Performance Improvements

Up to this point, we had not devoted much energy to performance improvements so
there were many low-hanging fruit.