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.

Lustre-change: https://review.whamcloud.com/c/fs/lustre-release/+/13669
Lustre-commit: e83569da38138859a51c660dfb5ca5bf45c70a37

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-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Zhenyu Xu <bobijam@hotmail.com>
Reviewed-by: Alex Deiter <alex.deiter@gmail.com>
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/52069
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>