Some refactorings around Breakpoints

Rodrigo Mesquitarequested to merge
wip/romes/step-out-9 into master

Rebased on !14416 (closed) and !14451 (closed) Pre-requisite for making step out better than in !14416 (closed)

This MR includes the refactoring only, not the changes which change behavior. Those will come up in yet another patch

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