[FIX] website: keep query strings when redirecting 'website.' page

Urls like `/page/website.XXX` are redirected to `/page/XXX`.

Before this commit, the redirection would not keep query strings:
`/page/website.XXX?rde=1` would redirect to `/page/XXX`.

Now, we keep the query strings:
`/page/website.XXX?rde=1` will redirect to `/page/XXX?rde=1`

Closes #24140

Courtesy of @MTantin

addons/website/controllers/main.py

@@ -76,7 +76,10 @@ class Website(openerp.addons.web.controllers.main.Home):
         }
         # /page/website.XXX --> /page/XXX
         if page.startswith('website.'):
-            return request.redirect('/page/' + page[8:], code=301)
+            url = '/page/' + page[8:]
+            if request.httprequest.query_string:
+                url += '?' + request.httprequest.query_string
+            return request.redirect(url, code=301)
         elif '.' not in page:
             page = 'website.%s' % page