LU-17081 build: compatibility for 6.5 kernels

LU-17081 build: compatibility for 6.5 kernels

Linux commit v6.4-rc2-29-gc6585011bc1d
  splice: Remove generic_file_splice_read()

Prefer filemap_splice_read and provide alternates for older kernels.

Linux commit v6.4-rc2-30-g3fc40265ae2b
  iov_iter: Kill ITER_PIPE

ITER_PIPE and iov_iter_is_pipe() are removed, provide a replacement
for iov_iter_is_pipe

Linux commit v6.4-rc4-53-g54d020692b34
  mm/gup: remove unused vmas parameter from get_user_pages()

Use vma_lookup() to acquire the vma following get_user_pages()

Linux commit v6.4-rc7-1884-gdc97391e6610
  sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)
Use sendmsg when MSG_SPLICE_PAGES is defined. Provide a wrapper
using sendpage() for older kernels.

HPE-bug-id: LUS-11811
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: I95a0954a602c8db08d30b38a50dcd50107c8f268
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52258
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: Petros Koutoupis <petros.koutoupis@hpe.com>
Reviewed-by: xinliang <xinliang.liu@linaro.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>