[REF] extract getConflicts function

[eileenmcnaughton]

Overview

Code extraction for readability

Before

Code less readable

After

Code more readable

Technical Details

Comments

This is for readability but I also want to add an api that retrieves conflicts without
trying a merge for more control & this will help with that

[civibot]

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[seamuslee001]

@eileenmcnaughton this needs a rebase now

[eileenmcnaughton]

@seamuslee001 done also doing this one right now ... #14144

[seamuslee001]

this looks like a nice clean extraction, we have plenty of dedupe tests which should tell us if there is something wrong, adding merge on pass