[FIX] dms: Improve the unlink method in base to avoid errors

In the uninstall process of dms, checks were made that prevented the
removal of fields and models being deleted, also causing the dms_file
and dms_directory tables to continue to exist.

dms/models/base.py

@@ -1,4 +1,5 @@
 # Copyright 2021 Tecnativa - Jairo Llopis
+# Copyright 2024 Tecnativa - Víctor Martínez
 # License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
 
 from odoo import models
@@ -8,12 +9,16 @@ class Base(models.AbstractModel):
     _inherit = "base"
 
     def unlink(self):
-        """Cascade DMS related resources removal."""
+        """Cascade DMS related resources removal.
+        Avoid executing in ir.* models (ir.mode, ir.model.fields, etc), in transient
+        models and in the models we want to check."""
         result = super().unlink()
-        self.env["dms.file"].sudo().search(
-            [("res_model", "=", self._name), ("res_id", "in", self.ids)]
-        ).unlink()
-        self.env["dms.directory"].sudo().search(
-            [("res_model", "=", self._name), ("res_id", "in", self.ids)]
-        ).unlink()
+        if (
+            not self._name.startswith("ir.")
+            and not self.is_transient()
+            and self._name not in ("dms.file", "dms.directory")
+        ):
+            domain = [("res_model", "=", self._name), ("res_id", "in", self.ids)]
+            self.env["dms.file"].sudo().search(domain).unlink()
+            self.env["dms.directory"].sudo().search(domain).unlink()
         return result