[FIX] website_sale: force int for qty in UI to stay coherent

Previously, some screen in front was casted in Integer, others not.

This commits closes #22443

To improve in master using precision decimal, t-field, ...
But avoid to change in dom tree in stable version

addons/website_sale/views/templates.xml

@@ -876,7 +876,7 @@
                                 <a t-attf-href="#" class="mb8 input-group-addon js_add_cart_json" data-no-instant="">
                                     <i class="fa fa-minus"></i>
                                 </a>
-                                <input type="text" class="js_quantity form-control quantity" t-att-data-line-id="line.id" t-att-data-product-id="line.product_id.id" t-att-value="int(line.product_uom_qty)" />
+                                <input type="text" class="js_quantity form-control quantity" t-att-data-line-id="line.id" t-att-data-product-id="line.product_id.id" t-att-value="int(line.product_uom_qty) == line.product_uom_qty and int(line.product_uom_qty) or line.product_uom_qty" />
                                 <a t-attf-href="#" class="mb8 input-group-addon float_left js_add_cart_json" data-no-instant="">
                                     <i class="fa fa-plus"></i>
                                 </a>
@@ -953,7 +953,7 @@
                             <span t-esc="line.product_id.with_context(display_default_code=False).display_name" class="h6" />
                         </a>
                         <br />
-                        <small>Qty: <t t-esc="int(line.product_uom_qty)" /></small>
+                        <small>Qty: <t t-esc="int(line.product_uom_qty) == line.product_uom_qty and int(line.product_uom_qty) or line.product_uom_qty" /></small>
                     </div>
                 </div>
             </t>
@@ -1324,7 +1324,7 @@
                                             </div>
                                         </td>
                                         <td>
-                                            <div t-esc="line.product_uom_qty" />
+                                            <div t-esc="int(line.product_uom_qty) == line.product_uom_qty and int(line.product_uom_qty) or line.product_uom_qty" />
                                         </td>
                                         <td class="text-center">
                                             <span t-field="line.price_unit" style="white-space: nowrap;" t-options="{'widget': 'monetary','from_currency': website_sale_order.pricelist_id.currency_id,'display_currency': website.currency_id}" />
@@ -1473,7 +1473,7 @@
                                           </td>
                                           <td>
                                               <div id="quote_qty">
-                                                  <span t-field="line.product_uom_qty"/>
+                                                  <span t-esc="int(line.product_uom_qty) == line.product_uom_qty and int(line.product_uom_qty) or line.product_uom_qty"/>
                                                   <span t-field="line.product_uom"/>
                                               </div>
                                           </td>