meta-python: migrate away from setuptool3 where possible

Many recipes are currently building with setuptools3 but can use a more
modern tool: typically setuptools_build_meta but ordered-set can use
flit_core and pyrad can use poetry_core.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>

meta-python/recipes-devtools/python/python3-traitlets_5.1.1.bb

@@ -13,4 +13,4 @@ RDEPENDS:${PN} = "\
     ${PYTHON_PN}-decorator \
 "
 
-inherit setuptools3 pypi
+inherit pypi setuptools_build_meta