[FIX] stock: do not update moves when writing quantities lower than UoM precision

Suppose product P has UoM U with rounding R, and the stock move has quantity Q.
Edit the quantity done to be Q + e, with e << R.
By the semantic of the UoM rounding, this should mean that no change has been
done.
However no such check was done, so a message was posted in chatter, of the form:
The done move line has been corrected.
P:
Quantity : 1000.0 -> 1000.0000000000001

opw 2006831

closes odoo/odoo#34124

Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>

addons/stock/models/stock_move_line.py

@@ -276,7 +276,10 @@ class StockMoveLine(models.Model):
         # When editing a done move line, the reserved availability of a potential chained move is impacted. Take care of running again `_action_assign` on the concerned moves.
         next_moves = self.env['stock.move']
         if updates or 'qty_done' in vals:
-            for ml in self.filtered(lambda ml: ml.move_id.state == 'done' and ml.product_id.type == 'product'):
+            mls = self.filtered(lambda ml: ml.move_id.state == 'done' and ml.product_id.type == 'product')
+            if not updates:  # we can skip those where qty_done is already good up to UoM rounding
+                mls = mls.filtered(lambda ml: not float_is_zero(ml.qty_done - vals['qty_done'], precision_rounding=ml.product_uom_id.rounding))
+            for ml in mls:
                 # undo the original move line
                 qty_done_orig = ml.move_id.product_uom._compute_quantity(ml.qty_done, ml.move_id.product_id.uom_id, rounding_method='HALF-UP')
                 in_date = Quant._update_available_quantity(ml.product_id, ml.location_dest_id, -qty_done_orig, lot_id=ml.lot_id,