Add reach points to the project

[ponceta]

General

• Fix several bugs

Describe your changes

• Add reach points to the project visible from scale 1:100
• Set as mandatory fk_dataowner fk_provider for reach points, wastewater structures, reaches
• Set rule on reach attributes to avoid rp_obj_id duplication

Screenshots

Issue ticket number and link

Fix :

• vw_wastewater_structure is twice in the layer order and therefore twice on the map #462
• QGIS project : Reach points are not loaded #460
• WARNING Could not export to the interlis schema : Invalid dataowner reference for object 'ch000000CL000006' of type 'kanal' #459
• Cut reach does not work #422

Checklist before requesting a review

• I have performed a self-review of my code
• If it is a core feature, I have added thorough tests.
• CI Tests are green
• The documentation is up to date with the proposed change.
• My work is ready for review

Checklist before merge

• A review has been performed
• Comments are resolved
• Documentation is ready

[ponceta]

As this is central, I would be glad to have some testing on this!

[ponceta]

This is based on old main branch, I have to redo all my changes... I'll open a new PR.