LU-16707 scripts: ignore some files in license-status

LU-16707 scripts: ignore some files in license-status

Many files in-tree don't need a SPDX tag - so lets
ignore them in license-status.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I31a0ae474fce78885e0391544500c2339dae66d7
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57833
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>