Move webbrowser.py into pyodide-py. ### Description

Moves our webbrowser.py stub into pyodide-py. It doesn't affect users, as pyodide-py is unpacked to /lib/python3.11/ during the initialization.

We won't need `pyodide.asm.data` anymore after we merge this and #3582.
from pytest_pyodide import run_in_pyodide


@run_in_pyodide(packages=["regex"])
def test_regex(selenium):
    import regex

    assert regex.search("o", "foo").end() == 2

from pytest_pyodide import run_in_pyodide


@run_in_pyodide(packages=["regex"])
def test_regex(selenium):
    import regex

    assert regex.search("o", "foo").end() == 2
