python3-txaio: Migrate setup.py to pyproject.toml

Fixes
WARNING: python3-txaio-25.9.2-r0 do_check_backend: QA Issue: inherits setuptools3 but has pyproject.toml with setuptools.build_meta, use the correct class [pep517-backend]

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-txaio_25.9.2.bb

@@ -5,7 +5,7 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=588502cb4ffc65da2b26780d6baa5a40"
 
 SRC_URI[sha256sum] = "e42004a077c02eb5819ff004a4989e49db113836708430d59cb13d31bd309099"
 
-inherit pypi setuptools3
+inherit pypi python_setuptools_build_meta
 
 RDEPENDS:${PN} += " \
     python3-twisted \