LU-17814 utils: Add deep copy of find_param

LU-17814 utils: Add deep copy of find_param

Need to copy find_param for each work unit.

Technically not all fields need to be copied, but a bunch
do and it's much easier to copy the whole thing than work
out precisely which fields need to be copied.

Plus that is fragile to future changes, this should be more
robust.

Test-Parameters: trivial
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I7fbf909b3fc88ca4a4300abc7e4ccea776fff629
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57294
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>