python_hatchling: remove empty python sysroot dirs

python_hatchling: remove empty python sysroot dirs

In some cases, empty versioned directories are being left behind in
sysroots from previous versions of packages. This appears to be found
with recipes relying on hatchling, and causes errors at the do_compile
step:

|   File "/workspace/yocto/manual/openembedded-core/build/tmp-glibc/work/core2-64-oe-linux/python3-iniconfig/2.0.0-r0/recipe-sysroot-native/usr/lib/python3.11/site-packages/packaging/version.py", line 197, in __init__
|     match = self._regex.search(version)
|             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
| TypeError: expected string or bytes-like object, got 'NoneType'

To fix this error, add a do_prepare_recipe_sysroot postfunc in the
python_hatchling class that removes any nested empty directories from
the sysroots during build, so that dependent recipes don't get caught
on them.

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>