front-nge(collapsed nodes): merge multiple wip PR

[louisgreiner]

Ref https://github.com/osrd-project/osrd-confidential/issues/1385

To merge in this order:

• Add tests after rebased on main for stop times
• lgr/remove-unused-func
• lgr/backward-next-expanded-iterator
• lgr/fix-typo
• lgr/set-default-is-collapsed-value-old-dto
• lgr/new-ts-path-migration
• lgr/new-collapsed-nodes-tip-display
• (lgr/new-fix-port-assignation - can be reviewed)
• cni/13311-upsert-stop-in-train-run - can be reviewed
• lgr/refactor-replaceIntermediateStopWithNode - can be reviewed
• mrd/drag-node-in-out