feat: Adds pip freeze to several sessions in the noxfile to aid in troubleshooting

[chalmerlowe]

Adds the pip freeze command to several sessions in the noxfile to aid in troubleshooting.
When tests fail, especially with older versions of the code it is sometimes useful to know what versions of the dependencies have been installed.

[conventional-commit-lint-gcf]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot
https://conventionalcommits.org/

[chalmerlowe]

The prerelease failure is a known entity. It is being handled in another Issue/PR.

In fact, this PR is being incorporated to help enable better troubleshooting in issues such as that one.

[Linchin]

system-3.9 seems to be failing due to connection flakiness

[chalmerlowe]

system-3.9 seems to be failing due to connection flakiness

This is the known problem I reference above and has been consistent for many days (back to April 19th).
I have a second PR that will hopefully correct that problem, but I am waiting on this to merge to help with some of the debugging.

[tswast]

+1, very useful for debugging to have the actual package list before running the tests.

[tswast]

FAILED tests/system/test_gbq.py::TestReadGBQIntegration::test_timeout_configuration appears unrelated. I'll see if I can use some admin powers to merge.