Before this commit (and the previous ones that prepare it), the contact
us page was largely editable but not entirely. The automatic address
field on the right column prevented the page to be considered like any
other page and only the left column was editable. That led to less
possibilities and difficulties to make a modern contact page.
Now, the whole page is static, like a page the user would have created
himself. Same for the thank you page. This comes with the disadvantage
of having to handle the address by yourself (but that's not a field that
would normally change a lot anyway) and the website_crm app now needs to
be enabled on the form via edit mode after install to change the form
action to lead creations.
Part of https://github.com/odoo/odoo/pull/69888
task-2462993
Matthieu Stockbauer
2c41797266