Update the noxfiles with performance enhancements to support debugging.

Update the noxfiles with performance enhancements to support debugging.

* Add `session.run('python', '-m', 'pip', 'freeze')` immediately after the last `session.install()` call in each session.
* Add `*session.posargs,` as the last item in session.run() that launch `pytest`.
This allows calls such as `nox -s unit -- -vv` to produce verbose test results OR `nox -s unit -- --lf` to only execute the tests that failed in the last session.

Consider whether a similar `*session.posargs,` would be beneficial in any of the other sessions to selectively allow us to feed args to tools like `black`, `ruff`, etc)