test_fs in test-mount.py from ubuntu_qrt_apparmor.test_utils_testsuite(3) failed on Oracle instance with Noble

This issue can be found with N-6.8.0-35.35 and N-oracle-6.8.0-1006.6 on Oracle instances.

Test log:

 === test-mount.py ===
 ......................F..........................................
 ======================================================================
 FAIL: test_fs (__main__.MountTestFilesystems.test_fs)
 ----------------------------------------------------------------------
 Traceback (most recent call last):
   File "/tmp/testlib1u2a2kff/source/noble/apparmor-4.0.0-beta3/utils/test/test-mount.py", line 135, in test_fs
     self.assertTrue(fs_name in valid_fs, '/proc/filesystems contains %s which is not listed in MountRule valid_fs' % fs_name)
 AssertionError: False is not true : /proc/filesystems contains rpc_pipefs which is not listed in MountRule valid_fs

 ----------------------------------------------------------------------
 Ran 65 tests in 0.009s

 FAILED (failures=1)
 make[1]: *** [Makefile:85: check] Error 1
 make[1]: Leaving directory '/tmp/testlib1u2a2kff/source/noble/apparmor-4.0.0-beta3/utils/test'
 make: *** [Makefile:103: check] Error 2