Deepfreeze essential parts of the encodings module. ### Description

This is a split off from #3582.

Deepfreeze essential parts of encodings module (encodings.\__init__, encodings.utf_8, and encodings.aliases), which is required during the Python bootstrap.

# _pyodide is imported at the very beginning of the initialization process so it
# cannot import from js, pyodide_js, or _pyodide_core.
#
# register_js_finder is called from pyodide.js after _pyodide_core is completely
# initialized.
#
# All pure Python code that doesn't require imports from js, pyodide_js, or
# _pyodide_core belongs in _pyodide. Code that requires such imports belongs in
# pyodide.
from . import _base, _importhook

__all__ = ["_base", "_importhook"]

# _pyodide is imported at the very beginning of the initialization process so it
# cannot import from js, pyodide_js, or _pyodide_core.
#
# register_js_finder is called from pyodide.js after _pyodide_core is completely
# initialized.
#
# All pure Python code that doesn't require imports from js, pyodide_js, or
# _pyodide_core belongs in _pyodide. Code that requires such imports belongs in
# pyodide.
from . import _base, _importhook

__all__ = ["_base", "_importhook"]
