LU-7073 tests: Add file migration to racer

LU-7073 tests: Add file migration to racer

Make racer run both blocking and non-blocking "lfs migrate" commands.
Implement this within the file_create.sh script, since it is already
selecting among different layout types.

Update Makefile.am to avoid listing every racer filename explicitly
to make it easier to add new types of operations in the future.

Test-Parameters: trivial testlist=racer,racer,racer
Test-Parameters: fstype=zfs testlist=racer,racer,racer
Signed-off-by: Henri Doreau <henri.doreau@cea.fr>
Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Change-Id: I51b3f19c78029ff47102e96a71ec4a0fc472183a
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/13669
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Zhenyu Xu <bobijam@hotmail.com>
Reviewed-by: Alex Deiter <alex.deiter@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>