LU-18972 lustreapi: Implement llapi_lmv_get_uuids

LU-18972 lustreapi: Implement llapi_lmv_get_uuids

Provide missing implementation for declared method in lustreapi

Fixes: 322968acf1 ("LU-819 utils: Fix lfs getstripe -M")
Test-Parameters: trivial
Signed-off-by: Praveen Singh Solanki <praveen.solanki@gmail.com>
Change-Id: I561c875281de9bfc26cc61cf07631ac7d0740163
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/59107
Reviewed-by: Sonia Sharma <sonia.sh.sharma@oracle.com>
Reviewed-by: Aurelien Degremont <adegremont@nvidia.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>