[3.11] gh-109295: Fix test_os.test_access_denied() for TEMP=cwd (GH-109299) (#109303)

gh-109295: Fix test_os.test_access_denied() for TEMP=cwd (GH-109299)

Fix test_os.test_access_denied() when the TEMP environment variable
is equal to the current working directory. Run the test using a
different filename, since self.fname already exists in this case.
(cherry picked from commit 7dedfd3)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Lib/test/test_os.py

@@ -726,7 +726,7 @@ def test_access_denied(self):
         # denied. See issue 28075.
         # os.environ['TEMP'] should be located on a volume that
         # supports file ACLs.
-        fname = os.path.join(os.environ['TEMP'], self.fname)
+        fname = os.path.join(os.environ['TEMP'], self.fname + "_access")
         self.addCleanup(os_helper.unlink, fname)
         create_file(fname, b'ABC')
         # Deny the right to [S]YNCHRONIZE on the file to