LU-17525 llite: soft fail unaligned dio

LU-17525 llite: soft fail unaligned dio

Skip unaligned DIO and pass io as buffered I/O rather than
hard fail unaligned DIO.

Test-Parameters: testlist=sanity serverversion=2.14 env=SANITY_EXCEPT="65n 211 413"
Fixes: ff018bb77a ("LU-18284 llite: disallow udio exceptions")
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: I638f62ec96abc3032da5fbcf895cd835022fd759
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/56775
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Patrick Farrell <patrick.farrell@oracle.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>