Update warning filters for Python 3.11.0b1 etc

Update warning filters for Python 3.11.0b1 etc

Python 3.11.0b1 adds new deprecation warnings for "dead batteries"
in the stdlib, both for our dependencies and ourself (telnetlib is
used a bit in the selftest). Also some new warnings are cropping up
with pip 22 and SetupTools 62, so filter those for now until they're
solved. Drop a filter for deprecated sre_constants use in the
pkg_resources vendored version of pyparsing which has recently been
updated.