toil(pkg-mgr:pip): report SBOM "cachi2:missing_hash:in_file" property...

[ben-alkov]

...when any 'requirements*.txt file is unhashed

• fix test data

Maintainers will complete the following section

• [ ] Commit messages are descriptive enough
• [ ] Code coverage from testing does not decrease and new code is covered
• [ ] Docs updated (if applicable)
• [ ] Docs links in the code are still valid (if docs were updated)

Note: if the contribution is external (not from an organization member), the CI pipeline will not run automatically. After verifying that the CI is safe to run:

• approve GitHub Actions workflows by clicking a button
• approve the Red Hat Trusted App Pipeline container build by commenting /ok-to-test (as is the standard for Pipelines as Code)

[ben-alkov]

~This one-line change produces correct SBOMs, but I'm not completely comfortable with it as I don't fully understand why it works...~

~Refactored, but I still don't completely understand why wheels need to be special-cased~

Ignore, this is obviated by later work.