LU-19110 lnet: add interop for net_delay commands

LU-19110 lnet: add interop for net_delay commands

Older Lustre versions do not have the net_delay subcommands,
which causes interop testing failures. Add interop checks
to mitigate this.

Test-Parameters: trivial
Test-Parameters: testlist=sanity-lnet serverversion=2.16
Test-Parameters: testlist=sanity-lnet serverversion=2.16
Test-Parameters: testlist=sanity-lnet serverversion=2.16
Test-Parameters: testlist=sanity-lnet serverversion=2.16
Fixes: 6d9cfdeda926 ("LU-18114 tests: fix the version checks")
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I1650dc5a3d851120e3e7b5edad68998110e83183
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/59853
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Emoly Liu <emoly@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>