[IMP] stock{_account}: update UX of valuation report

Note this is specific to the view shown when clicking on
"Reporting > Valuation", but this uses the same 'stock.quantity.history'
wizard and related custom js as "Configuration > Locations > Current Stock"

Minor UX updates to valuation report:
- don't default groupby product
- add filters incoming and outgoing (same logic as stock.move filters)
- replace "Inventory at Date" with "Valuation at Date" where appropriate
  (but leave location current stock view untouched)
- create separate view for the valuation report so remaining qty/value
  are displayed, but all other svl viewing actions (including the
  "Valuation at Date") will remain showing the original qty/value to
  support deeper analysis
- don't sum unit_cost when groupby is applied in list view since the
  value won't make sense
- add "reference" to svl which is = to stock.move.reference

"valuation" part of b2b task: 2882539

Part-of: odoo/odoo#97109