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: soupsieve
  version: 2.2.1
source:
  sha256: 052774848f448cf19c7e959adf5566904d525f33a3f8b6ba6f6f8f26ec7de0cc
  url: https://files.pythonhosted.org/packages/c8/3f/e71d92e90771ac2d69986aa0e81cf0dfda6271e8483698f4847b861dd449/soupsieve-2.2.1.tar.gz
# The following creates a dependency cycle and causes an infinite recurse in
# buildall. For 0.17.0 release, we are using a temporary hack.
# requirements:
#   run:
#     - beautifulsoup4
test:
  imports:
  - soupsieve

package:
  name: soupsieve
  version: 2.2.1
source:
  sha256: 052774848f448cf19c7e959adf5566904d525f33a3f8b6ba6f6f8f26ec7de0cc
  url: https://files.pythonhosted.org/packages/c8/3f/e71d92e90771ac2d69986aa0e81cf0dfda6271e8483698f4847b861dd449/soupsieve-2.2.1.tar.gz
# The following creates a dependency cycle and causes an infinite recurse in
# buildall. For 0.17.0 release, we are using a temporary hack.
# requirements:
#   run:
#     - beautifulsoup4
test:
  imports:
  - soupsieve
