Editor: Linear Metadata edition - sync change between geo and linear metadata

[sim51]

When the geometry change (add/move/delete a point), we call the following function entityDoUpdate in the file https://github.com/DGEXSolutions/osrd/blob/dev/front/src/applications/editor/components/LinearMetadata/data.ts#L551

This function doesn't handle all the cases like :

• delete the starting point
• moving the starting point
• delete the ending point