LU-14668 tests: verify state of peer added with '--lock_prim'

LU-14668 tests: verify state of peer added with '--lock_prim'

Add peer state verification to sanity-lnet test_26:
check that peer state has corresponding bit set for a peer
created with '--lock_prim' option.

Lustre-change: https://review.whamcloud.com/50249
Lustre-commit: 9b6fcfa334b153e52caec16d4cfd180306826a3a

Test-Parameters: trivial testlist=sanity-lnet
Fixes: 05f7f6a0b ("LU-14668 lnet: add 'force' option to lnetctl peer del")
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Change-Id: Id5fde036907f9dd19a21e8e6611a070321310f0e
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51135
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>