[3.13] gh-135386: Skip readonly tests for the root user (GH-138058) (GH-138064)

(cherry picked from commit 5b0f00e)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

Author: miss-islington

Lib/test/test_dbm_sqlite3.py

@@ -17,6 +17,11 @@
 from dbm.sqlite3 import _normalize_uri
 
 
+root_in_posix = False
+if hasattr(os, 'geteuid'):
+    root_in_posix = (os.geteuid() == 0)
+
+
 class _SQLiteDbmTests(unittest.TestCase):
 
     def setUp(self):
@@ -93,6 +98,7 @@ def test_readonly_iter(self):
         self.assertEqual([k for k in self.db], [b"key1", b"key2"])
 
 
+@unittest.skipIf(root_in_posix, "test is meanless with root privilege")
 class ReadOnlyFilesystem(unittest.TestCase):
 
     def setUp(self):