[IMP] auto_backup: phase out deprecated osutil.tempdir()

Before this commit  a backup would give the following warning:
odoo.tools.osutil.tempdir: Deprecated: use tempfile.TemporaryDirectory
We go to the natie TemporaryDirectory() now and follow Odoo their path (odoo/odoo#39573)
"tempdir is redundant with tempfile.TemporaryDirectory added in 3.2"

auto_backup/models/db_backup.py

@@ -288,7 +288,7 @@ def _take_dump(self, db_name, stream, model, backup_format='zip'):
         cmd.append(db_name)
 
         if backup_format == 'zip':
-            with odoo.tools.osutil.tempdir() as dump_dir:
+            with tempfile.TemporaryDirectory() as dump_dir:
                 filestore = odoo.tools.config.filestore(db_name)
                 if os.path.exists(filestore):
                     shutil.copytree(filestore, os.path.join(dump_dir, 'filestore'))