LU-17287 tests: remove trap 0

LU-17287 tests: remove trap 0

.. from destroy_test_pools() as this interrupts current trap
chain making stack_trap useless.

Test-Parameters: trivial
Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: If978389a140f21ac520ef21b505378b8f64d8f73
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/53127
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>