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.

{
  "Bucket": "pyodide-cdn2.iodide.io",
  "WebsiteConfiguration": {
    "IndexDocument": {
      "Suffix": "index.html"
    }
  }
}

{
  "Bucket": "pyodide-cdn2.iodide.io",
  "WebsiteConfiguration": {
    "IndexDocument": {
      "Suffix": "index.html"
    }
  }
}
