fix(requirements): refactor to use common codepath for table coalescing (#7047)

* align both formats behaviors and now they will just differ in how to discover their paths
* add coverage for exports format and fix expected assertions for parent-child format to match the logic child values always wins
* just partially revert dda84976, this way parents values could be overridden when coalescing
* after getting better coverage we were able to refact both formats behaviors by merging their propagation logics into a single code path.