merge py3.8 into release

--HG--
branch : release-pypy3.8-v7.x
2 jobs for release-pypy3.8-v7.3.6rc3 in 28 minutes and 46 seconds
latest
Status Name Job ID Coverage
  Test
passed check_rpython_annotations #252722

00:07:30

passed hpy_tests #252723

00:28:45