LU-13802 llite: add fail loc to force bio-dio switch

LU-13802 llite: add fail loc to force bio-dio switch

This adds a fail loc to force switching from BIO to DIO.

Test-Parameters: trivial
Test-Parameters:testlist=sanity env=ONLY=119j,ONLY_REPEAT=50
Signed-off-by: Patrick Farrell <patrick.farrell@oracle.com>
Change-Id: Icba303c32a86170af08a78c6b306db08e8ed6047
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52593
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>