[IMP] base, website: fix prewebsite specific views

Things to know about specific views:

Since the introduction of website specific views, we can have multiple
views that are related to a website (specific views). These views have
no xml_id as it is only set on the original view (generic view).
We rely on the view's key to identify related views as it is the same
for all specific views of a generic view. Also the key is equals to the
xml_id.

When a generic view is updated, we will check if the specific views have
the same values as the generic view. If it is the case, the value that
are the same are considered updatable and are updated on both the
generic and specific view. Else these are considered as noupdate.

When a generic view is created we will check if the potential parent
generic view has specific views. If it is the case we will create a copy
of the created view for each specific view.

The issue:

The method that checks if a created/updated view has specific views is
located in website. When we update a module, each modules are
initialized and updated in a specific order. If a generic view that has
specific views located in a module loaded before website this view's
specific views will not be updated/created as the method does not exist.
This issue is mainly affecting portal views at the moment.

The solution:

For write:
We now COW(copy on write) the views in base module, meaning this will
apply to all qweb views that are duplicated and not only the website
specific ones.

For create:
We  will create the generic view as before but wait until we have
updated all the modules to gather all generic views that are supposed
to have a specific view but don't and create the specific views.
This will result in a change of behavior being that if a specific view
that have a parent is deleted it will be recreated on update
(same behavior as a generic view).

closes odoo/odoo#52629

X-original-commit: b1a90ee2bb441aa52e3cf4607c43fb464b55b1d7
Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>
Signed-off-by: fja-odoo <fja-odoo@users.noreply.github.com>

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