Skip orphan artifacts when validating artifact generation

[ogenstad]

Why

Orphaned artifacts were preventing the artifact generation in the pipeline to work, this change ensures that the pipeline doesn't get impacted if something like this were to happen.

Closes #9188

What changed

• A new check to avoid including orphans which would break cause later exceptions
• Small refactoring to break out a piece of the code to an external function. The reason for this was that the code body was getting too long and complex. It's still hard to read and parse and could benefit from a larger refactoring.
• Added tests

[codspeed-hq]

Merging this PR will not alter performance

✅ 12 untouched benchmarks

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_{Comparing pog-artifact-generation-IFC-2569 (6230d12) with stable (045500f)}