fix: flake8 config now properly excluding tests

[danphenderson]

Problem

The flake8 config is ignoring test, which doesn't exist

Solution

It should ignore tests, or maybe the exclude line should be removed.

Checklist

• [x] I have read the contributing guide and understand what's expected of me
• [x] I have run this code in development and it appears to resolve the stated issue
• [x] This PR includes tests, or tests are not required/relevant for this PR
• [x] This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX

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[danphenderson]

Sorry for spamming. I will follow the rules.. I was trying to be quick.