[FIX] mrp: bill of material overlapping

Steps to reproduce:
- install the mrp_plm module (Product Lifecycle Management app);
- create a product with a long name;
- create a bill of material for that product;
- create a manufacturing order and select that bill of material;
- confirm the manufacturing order.

Issue:
The value of the bill of material field overflows into the second column.

Cause:
There is a problem in the use of classes in the .xml file (o_row and d-flex).

Solution:
Change the classes used (Bootstrap and Odoo classes) to have the correct rendering.

opw-2966863

closes odoo/odoo#100305

X-original-commit: 7a7c6870a2006edab8ffe62c016e5eb0681a46f8
Signed-off-by: Hubert Van De Walle <huvw@odoo.com>
Signed-off-by: Lefebvre Thomas (thle) <thle@odoo.com>

addons/mrp/views/mrp_production_views.xml

@@ -197,8 +197,8 @@
                             <field name="forecasted_issue" invisible="1"/>
                             <field name="company_id" invisible="1"/>
                             <field name="product_description_variants" attrs="{'invisible': [('product_description_variants', 'in', (False, ''))], 'readonly': [('state', '!=', 'draft')]}"/>
-                             <label for="bom_id" name="bom_label"/>
-                            <div class='o_row d-flex' name="bom_div">
+                            <label for="bom_id" name="bom_label"/>
+                            <div class='o_row' name="bom_div">
                                 <field name="bom_id"
                                     context="{'default_product_tmpl_id': product_tmpl_id}" attrs="{'readonly': [('state', '!=', 'draft')]}"/>
                             </div>