Bump up to python3.10

This adds python3.10 testing on Jammy and switches the docker images to
python3.10 from 3.8.

We run sudo for postgres with -Hi to avoid non fatal errors when
postres' client attempts to write command history to Zuul's homedir (it
is running as the postgres user which can't write to zuul's homedir). We
also need to update the libffi package version for jammy to 8 in
bindep.txt. Finally, python_version values need to be quoted as "3.10"
is different than 3.10 which is equivalent to 3.1 when serialized by
yaml as a float.

Force setuptools to use stdlib (shipped by the distro) distutils to
avoid problems with virtualenvs not actually being virtualenvs.

Finally we switch the bulk of jobs over to using nodeset: ubuntu-jammy
as the default python there is 3.10.

Change-Id: I97b90bb7a23c90f108f23dda9fdd0e89f9f4dbca

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