python-utils-r1.eclass: Cleanup cache dirs after epytest

Make epytest clean up common cache directories .hypothesis
and .pytest_cache after the execution.  If pytest is executed
in ${BUILD_DIR}/lib, these directories end up being wrongly installed,
and so far ebuilds had to handle cleaning them up.

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

eclass/python-utils-r1.eclass

@@ -1272,7 +1272,12 @@ epytest() {
 
 	echo "${@}" >&2
 	"${@}" || die -n "pytest failed with ${EPYTHON}"
-	return ${?}
+	local ret=${?}
+
+	# remove common temporary directories left over by pytest plugins
+	rm -rf .hypothesis .pytest_cache || die
+
+	return ${ret}
 }
 
 # @FUNCTION: eunittest