Add user journey test to check that logs can be found for failed builds

[peytondmurray]

Fixes #672.

Description

This PR implements a user journey test that checks that a user can access logs for a failed build.

This pull request:

• Adds a simple broken environment spec
• Implements a get_logs function for the user journey API utils
• Adds a test for the user journey mentioned above

Pull request checklist

• [x] Did you test this change locally?
• [x] Did you update the documentation (if required)?
• [x] Did you add/update relevant tests for this change (if required)?

How to test

Run the conda-store server:

docker compose up

Then run the test:

cd conda-store-server
pytest tests/user_journeys/test_user_journeys.py::test_failed_build_logs

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[peytondmurray]

Test failures appear to be unrelated.