LU-17878 build: compatibility updates for kernel 6.9

LU-17878 build: compatibility updates for kernel 6.9

Linux v6.8-2-ga8922f79671f
  ceph: remove SLAB_MEM_SPREAD flag usage

Provide a replacement for older kernels when SLAB_MEM_SPREAD
is not defined.

Linux v6.8-rc1-47-gc69ff4071935
  filelock: split leases out of struct file_lock

Provide abstractions for:
  flc_type, flc_pid, flc_file, flc_flags, and flc_owner

Test-Parameters: trivial
HPE-bug-id: LUS-12363
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: Ide457ba29fc2d3537f074fe9a66cf0c8567f7621
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/55201
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>