Test LogReader scenarios for auto_source

[markopetkovic96]

for #31223
no logs available -> should error for all query types: test fail for all query types.
rlogs not available, but qlogs are -> should error with /r, pass with /q and /a: test pass for /q, but fail for /r and /a.
rlogs only available for specific segments, but qlogs are available for the rest -> should error with /r, pass with /a: pass with /r, error with /a.
rlog not available on comma api, but is available from another source (openpilot ci bucket, commaCarSegments), rlogs should be parsed: test return comma_api, where is not available rlog.
I wrote a few tests for auto_source, just to make sure this is a good approach. As you can see, I have deviations from the expected results in several cases. In that case, is it necessary to modify the auto_source function, or is a different approach to the test needed?
For the case where rlog is not available on the comma api, the test just checks the return from auto_source. Can you explain what you mean by rlogs should be parsed? If the return from auto_source is rlog on the comma api, where is not available, rlogs should be parsed?

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[markopetkovic96]

@jnewb1 After converting the unittests to pytest, I created a mock HTTP server.

[github-actions]

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[markopetkovic96]

@jnewb1

[adeebshihadeh]

Sorry this took a while to review, but I'm going to close this. It's far too messy: brittle checks (specific error strings), too many lines, wrong indentation, etc.

Feel free to clean this up and resubmit if you'd like (would still honor the bounty).