[ADD]: new module to make large inventory with small sub-inventories

This feature lets users compose inventories with sub-inventories in
a hierarchical tree.

This is useful in medium/large warehouses where
several teams must work in parallel to make inventories.

The module stock_inventory_hierarchical_location lets users install stock_inventory_hierarchical and
stock_inventory_location at the same time

Contributions from Lionel Sausin (Numérigraphe) and Laetitia GANGLOFF (Ascone).