LU-18810 llite: apply filename encoding to llite/*

LU-18810 llite: apply filename encoding to llite/*

Apply filename encoding feature to the files under llite.

This is a port of
Lustre-change: https://review.whamcloud.com/58124
Lustre-commit: TBD (from b00f33574f6fbb3cbad290c3eb6bf63d97b27bb0)
EX-bug-id: EX-11415

Signed-off-by: Emoly Liu <emoly@whamcloud.com>
Change-Id: I38c4e5b62b8bc72cb3990a80792dd2907b8b26a8
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58434
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>