Modelling of multipoint and p2mp links

[italobusi]

See: https://datatracker.ietf.org/meeting/interim-2024-nmop-01/materials/slides-interim-2024-nmop-01-sessa-applicability-of-te-topology-data-model-to-digital-map-01.pdf

p2mp-link-options-03.pptx

[italobusi]

Modelling for multipoint and point-to-multipoint links added in draft-ietf-teas-te-topology-profiles-04

Not clear whether discussing the possible optimization options (as in p2mp-link-options-03.pptx) is or not in the scope of this document