LU-8582 tests: skip sanity/905 for old OSTs

LU-8582 tests: skip sanity/905 for old OSTs

The fail_loc used in sanity test_905 does not exist in older OSTs.
Skip this subtest for older OSTs.

Fixes: 566edb8c43 ("LU-8582 target: send error reply on wrong opcode")
Test-Parameters: trivial testlist=sanity serverversion=2.12.9 env=ONLY=905
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I8fa50ec0f66afd9f24d562e0be57a416c04d8ba8
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51568
Tested-by: Maloo <maloo@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Sarah Liu <sarah@whamcloud.com>
Reviewed-by: Alex Deiter <alex.deiter@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>