[FIX] website: correct the website editor tour

Introduced with [1] the goal of this tour was to check some lazy loading
stuff regarding the edit mode.
It was then "wrongly" adapted with [2] where the tour actually still
started in the frontend and then clicked on a the new UI button (top
left floating icon of the frontend > backend task) to indirectly enter
edit mode.
While it was working, that's not what the test was aiming to test. The
test should remain as it was, testing the edit mode. While the edit btn
is now in the backend and not the frontend, the tour should just start
there.

Note that this commit is required as the behavior the tour was now
relying on is removed by the previous commit: the Edit button is not
entering edit mode anymore.
Instead of adding a new step to click on the Edit btn, let's just start
the tour as before on the step where you can click on Edit.
It will make the test less dependent of other behavior. This is
especially true since that frontend "Edit" button will most likely
change again or be removed (and introduced back?). We don't want the
tour to rely on this.
If those new UI button need to be tested, it should be in another test.

[1]: https://github.com/odoo/odoo/commit/6f4c60fe1bb6e460ec6da00c59a9825271893729
[2]: https://github.com/odoo/odoo/commit/99b50d18e220aedf14de806f4bf1b2d35c32de35

closes odoo/odoo#95002

Signed-off-by: Romain Derie (rde) <rde@odoo.com>

addons/website/static/tests/tours/specific_website_editor.js

@@ -6,8 +6,8 @@ const tour = require('web_tour.tour');
 tour.register('generic_website_editor', {
     test: true,
 }, [{
-    trigger: 'a.o_frontend_to_backend_edit_btn',
-    content: 'Go to backend',
+    content: 'Click edit button',
+    trigger: '.o_edit_website_container > a',
 },
 {
     trigger: 'iframe body:not([data-hello="world"])',
@@ -19,8 +19,8 @@ tour.register('generic_website_editor', {
 tour.register('specific_website_editor', {
     test: true,
 }, [{
-    trigger: 'a.o_frontend_to_backend_edit_btn',
-    content: 'Go to backend',
+    content: 'Click edit button',
+    trigger: '.o_edit_website_container > a',
 },
 {
     trigger: 'iframe body[data-hello="world"]',

addons/website/tests/test_ui.py

@@ -3,6 +3,8 @@
 
 import base64
 
+from werkzeug.urls import url_encode
+
 import odoo
 import odoo.tests
 
@@ -173,9 +175,9 @@ class TestUi(odoo.tests.HttpCase):
             'path': custom_url,
             'website_id': new_website.id,
         })
-
-        self.start_tour("/website/force/%s" % website_default.id, "generic_website_editor", login='admin')
-        self.start_tour("/website/force/%s" % new_website.id, "specific_website_editor", login='admin')
+        url_params = url_encode({'path': '/@/'})
+        self.start_tour(f'/website/force/{website_default.id}?{url_params}', "generic_website_editor", login='admin')
+        self.start_tour(f'/website/force/{new_website.id}?{url_params}', "specific_website_editor", login='admin')
 
     def test_06_public_user_editor(self):
         website_default = self.env['website'].search([], limit=1)