dev-python/pip: Fix respecting PYTHON_TESTED

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/pip/pip-25.0.1-r1.ebuild

@@ -106,6 +106,11 @@ python_compile_all() {
 }
 
 python_test() {
+	if ! has "${EPYTHON}" "${PYTHON_TESTED[@]/_/.}"; then
+		einfo "Skipping tests on ${EPYTHON}"
+		return 0
+	fi
+
 	local EPYTEST_DESELECT=(
 		tests/functional/test_inspect.py::test_inspect_basic
 		# Internet