[IMP] website: set viewid in frontend & save template for dispatch

This commit is related to enterprise commit adding crm_track option to routes.

Before this commit:
We could not get template's name after dispatch() had been called. Indeed,
it will remove the template name from the response (response.flatten()) to
make it not considered as 'qweb' anymore (is_qweb()).

In some case (e.g. website_crm_score), we still need the template's name later.
(Eg: to retrieve the route's view being rendered and check if trackable or not)

Add view-id in template, when main_object is not an ir_ui_view, it avoid to
make extra rpc to get the view_id.

this commit closes #20313

addons/website/views/website_templates.xml

@@ -99,6 +99,7 @@
             'data-translatable': '1' if translatable else None,
             'data-edit_translations': '1' if edit_translations else None,
             'data-view-xmlid': xmlid if editable or translatable else None,
+            'data-viewid': viewid if editable or translatable else None,
             'data-main-object': repr(main_object) if editable or translatable else None,
             'data-oe-company-name': res_company.name
         }"/>

odoo/addons/base/ir/ir_ui_view.py

@@ -1078,6 +1078,7 @@ actual arch.
             datetime=datetime,
             relativedelta=relativedelta,
             xmlid=self.key,
+            viewid=self.id,
         )
         return qcontext
 

odoo/http.py

@@ -1219,6 +1219,7 @@ class Response(werkzeug.wrappers.Response):
     def set_default(self, template=None, qcontext=None, uid=None):
         self.template = template
         self.qcontext = qcontext or dict()
+        self.qcontext['response_template'] = self.template
         self.uid = uid
         # Support for Cross-Origin Resource Sharing
         if request.endpoint and 'cors' in request.endpoint.routing: