AIP-6643: Add in log file output per test

[alexlatchford]

To do:

• Understand root cause of intermittent 403 test failures (retries do seem to work which is weird).
• Understand root cause of intermittent S3 test failures.
• Add in per-test file logging output, in addition to live logs to the CLI.
  • Hopefully this will make these deeper investigations easier as logs won't be interleaved!
  • Logs go to the public/pytest-logs folder, to make room I've shifted the coverage HTML output from public to public/coverage to minimize conflicts.
• Re-enable all integration tests - Temporarily disabled to expedite testing!