LU-18919 nodemap: map suppgids from client

LU-18919 nodemap: map suppgids from client

Map back to the file system id space the supplementary groups
received from the client.

Add sanity-sec test_76 to exercise this.

Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: I9d6b6e5ae2fca476b102c8a02a62c1be75379acf
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58759
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Marc Vef <mvef@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>