Refactor project CI config calculation

What does this MR do and why?

This MR refactors project CI config calculation. This MR copies the project CI config calculation from pipeline/chain to a new class. This will make it easier to use the same logic from other places.

These changes are behind the feature flag ci_project_pipeline_config_refactoring (#372867 (closed)). With the feature flag removal, old places will be removed.

MR acceptance checklist

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