EX-9392 sec: add server_upcall rbac role

EX-9392 sec: add server_upcall rbac role

The purpose of the new server_upcall rbac role is to control whether
clients use the server side defined identity upcall. When set, clients
do comply with the server side identity upcall. When not set, clients
are leveraging the special INTERNAL identity upcall, which means
servers trust supplementary groups as provided by the clients.

Test-Parameters: trivial
Test-Parameters: testgroup=review-dne-part-2
Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: I01dcedad5da0e175aa7b8d187f2affd34d933e39
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/54360
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>