LU-17431 nodemap: modify all properties of a dynamic nm

LU-17431 nodemap: modify all properties of a dynamic nm

All properties of a dynamic nodemap must be taken into account. So
move the check for dynamic in nodemap_idx_* functions, except for
nodemap_activate which is independent of any nodemap.
Update sanity-sec test_72 to correctly exercise this.

Fixes: db818bd040 ("LU-17431 nodemap: allow modifying properties of a dynamic nm")
Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: I5fb7877669fdf7689b1be1f065006644f0a3f15c
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58088
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Marc Vef <mvef@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>