Packages the distutils stdlib module as a standalone package,
```
377K distutils.data
221K distutils.data.br
19K distutils.js
```
to reduce the minimal pyodide size.

Part of #1542 

This also,
 - adds documentation on what's supported or not in the stdlib
 - makes a few changes to `pyodide_build/buildall.py` to be able to add such stdlib packages as a dependency in other packages (which didn't work before). For instance, until there is a release with https://github.com/pypa/packaging/pull/396 micropip has a dependency on distutils.
Unvendor distutils. Packages the distutils stdlib module as a standalone package,
```
377K distutils.data
221K distutils.data.br
19K distutils.js
```
to reduce the minimal pyodide size.

Part of #1542 

This also,
 - adds documentation on what's supported or not in the stdlib
 - makes a few changes to `pyodide_build/buildall.py` to be able to add such stdlib packages as a dependency in other packages (which didn't work before). For instance, until there is a release with https://github.com/pypa/packaging/pull/396 micropip has a dependency on distutils.
package:
  name: biopython
  version: '1.78'
requirements:
  run:
  - numpy
source:
  sha256: 1ee0a0b6c2376680fea6642d5080baa419fd73df104a62d58a8baf7a8bbe4564
  url: https://files.pythonhosted.org/packages/89/c5/7fe326081276f74a4073f6d6b13cfa7a04ba322a3ff1d84027f4773980b8/biopython-1.78.tar.gz
test:
  imports:
  - Bio

package:
  name: biopython
  version: '1.78'
requirements:
  run:
  - numpy
source:
  sha256: 1ee0a0b6c2376680fea6642d5080baa419fd73df104a62d58a8baf7a8bbe4564
  url: https://files.pythonhosted.org/packages/89/c5/7fe326081276f74a4073f6d6b13cfa7a04ba322a3ff1d84027f4773980b8/biopython-1.78.tar.gz
test:
  imports:
  - Bio
