ZTS: Retry auto_spare_multiple.ksh

The auto_spare_multiple.ksh test may incorrectly fail for a similar
reason as the auto_spare_shared.ksh test.  Add it to known list of
exceptions which should be retried to prevent failures in the CI.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13318

tests/test-runner/bin/zts-report.py.in

@@ -262,6 +262,7 @@ elif sys.platform.startswith('linux'):
         'cli_root/zfs_rename/zfs_rename_002_pos': ['FAIL', known_reason],
         'cli_root/zpool_reopen/zpool_reopen_003_pos': ['FAIL', known_reason],
         'fault/auto_spare_shared': ['FAIL', 11889],
+        'fault/auto_spare_multiple': ['FAIL', 11889],
         'io/io_uring': ['SKIP', 'io_uring support required'],
         'limits/filesystem_limit': ['SKIP', known_reason],
         'limits/snapshot_limit': ['SKIP', known_reason],