Improve loading speed

[JeanChristopheMorinPerso]

• Use "super" wheel (wheel that includes other wheels)
• Reduce size of OTIO wheel. I have a feeling building in RelWithDebInfo instead of Debug might help. Or is there another way to not have cmake run strip?
• Use a webworker?
• Set fullStdLib to false when calling loadPyodide: https://pyodide.org/en/stable/usage/api/js-api.html?#globalThis.loadPyodide.
• Use -Oz Use emscripten's -Oz option for pandas pyodide/pyodide#2457.
• https://emscripten.org/docs/tools_reference/emcc.html#emcc-gn