archivers/py-zlib-ng: Update 0.4.3 → 0.5.0

Changelog:
https://github.com/pycompression/python-zlib-ng/releases/tag/v0.5.0

Improve port:

• Replace cmake requirement from BUILD_DEPENDS to USES=cmake:indirect.
• INSTALL_TARGET=install-strip doesn't work for this port - replace it with ${STRIP_CMD}.

PR: 280819