LU-17000 llite: fix memory leaks in error handling

LU-17000 llite: fix memory leaks in error handling

Ensure that allocations are freed before returning in case of errors.

CoverityID: 457069 ("Resource leak")
CoverityID: 457073 ("Resource leak")
CoverityID: 457077 ("Resource leak")

Test-Parameters: trivial
Fixes: ae828cd3b0 ("LU-4684 llite: add lock for dir layout data")
Fixes: ed4a625d88 ("LU-13717 sec: filename encryption - digest support")
Fixes: 2e2b16c28b ("LU-11025 dne: support directory restripe")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I5ff33a7243e1f536e5308f61451f205f232540e5
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58361
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Sebastien Buisson <sbuisson@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>