[FIX] web: restore formview mode when coming back (breadcrumbs)

Before this commit, when the user is in a form view (edit mode) and
click on a stat button, a new action is added to the action stack.  When
the user then comes back to the form view by clicking on the breadcrumb,
it is supposed to be in readonly mode.  Before this commit, this was not
the case.

This bug comes from the action manager refactoring, which removed the
view manager. With this commit, we add a new action lifecycle method
which is called when the action is restored.

Note that this commit implicitely changes the semantic of actions with
'target=inline'. As far as I can tell, this only applies to the settings
form view, which can easily be fixed by overriding the restore hook.

closes odoo/odoo#28663