Wheels can contain their package within the .data directory, inside the purelib or platlib directories, which is then unpacked into the correct site-packages folder.

Previously these directories were ignored, but this causes issues with packages such as semgrep that don't set Root-Is-Purelib: true and instead have the purelib directory under the .data package.

This is the same as setting Root-Is-Purelib: true and having all the files at the root, so I'm unsure of the reasons to do it this way 🤷

This results in the package being missing from the gazelle_python manifest files, and therefore causing issues with resolving dependencies.