NEW product_variant_so_always for 11.0

Adds boolean on the `product.template` form to force the 'dynamic' mode for NOT creating variants on `product.template` save, but rather when added to sale orders.

product_variant_so_always/models/__init__.py

@@ -0,0 +1 @@
+from . import product

product_variant_so_always/models/product.py

@@ -0,0 +1,13 @@
+from odoo import fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    always_variant_on_so = fields.Boolean(string='Always create variants on SO Lines')
+
+    def has_dynamic_attributes(self):
+        self.ensure_one()
+        if self.always_variant_on_so:
+            return True
+        return super(ProductTemplate, self).has_dynamic_attributes()