[MIG] document_page_approval: Finish migration

Changes done:
- Squash administrative commits
- Purge translations
- Remove ir.model.access.csv file
- Improve tests (change to setUpClass)
- Replace name_get() to _compute_display_name() (document_page)
- Remove readonly=1 (redudant, it already is) defined in approved_uid and approved_date fields in views
- Restore readonly=1 to the state field
- Remove duplicate Back to draft button

TT51529

document_page/models/document_page_history.py

@@ -66,5 +66,7 @@ class DocumentPageHistory(models.Model):
                 context=True,
             )
 
-    def name_get(self):
-        return [(rec.id, "%s #%i" % (rec.page_id.name, rec.id)) for rec in self]
+    @api.depends("page_id", "page_id.name")
+    def _compute_display_name(self):
+        for rec in self:
+            rec.display_name = f"{rec.page_id.name} #{rec.id}"