[FIX] product: Add form views for product product.attribute to avoid confusing generated ones

Currently there are no form views for products attributes. When editing the variants and clicking 'Create and edit' on the attributes or the attributes values, the views are really confusing for the users.

These simple views will avoid the frustration

addons/product/views/product_attribute_views.xml

@@ -36,6 +36,19 @@
             </field>
         </record>
 
+        <record id="product_attribute_view_form" model="ir.ui.view">
+            <field name="name">product.attribute.form</field>
+            <field name="model">product.attribute</field>
+            <field name="arch" type="xml">
+                <form string="Variant Values">
+                    <group>
+                        <field name="name"/>
+                        <field name="create_variant" groups="base.group_no_one"/>
+                    </group>
+                </form>
+            </field>
+        </record>
+
         <record id="attribute_action" model="ir.actions.act_window">
             <field name="name">Attributes</field>
             <field name="type">ir.actions.act_window</field>
@@ -44,6 +57,19 @@
             <field name="view_type">form</field>
         </record>
 
+        <record id="product_attribute_value_view_form" model="ir.ui.view">
+            <field name="name">product.attribute.value.form</field>
+            <field name="model">product.attribute.value</field>
+            <field name="arch" type="xml">
+                <form string="Variant Values">
+                    <group>
+                        <field name="name"/>
+                        <field name="price_extra"/>
+                    </group>
+                </form>
+            </field>
+        </record>
+
         <record id="variants_tree_view" model="ir.ui.view">
             <field name="name">product.attribute.value.tree</field>
             <field name="model">product.attribute.value</field>
@@ -63,4 +89,16 @@
             <field name="view_mode">tree</field>
             <field name="view_type">form</field>
         </record>
+
+        <record id="product_attribute_line_view_form" model="ir.ui.view">
+            <field name="name">product.attribute.line.form</field>
+            <field name="model">product.attribute.line</field>
+            <field name="arch" type="xml">
+                <form string="Product Attributes">
+                    <group>
+                        <field name="value_ids"/>
+                    </group>
+                </form>
+            </field>
+        </record>
 </odoo>
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