[FIX] website_blog:redirection 301 instead of 302 to new blog
[FIX] website_blog:redirection 301 instead of 302 to new blog

-Create a second blog
-Move one post to this second blog
-Access the post with the url from the first blog

Before this commit:
You will get redirected to the new url with a code 302 (temporary).

After this commit:
You will get redirected to the new url with the code to 301 (permanent).

OPW-2059194

closes odoo/odoo#36161

Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo