EX-9721 tests: fix sanity-sec test_64x for interop

EX-9721 tests: fix sanity-sec test_64x for interop

'server_upcall' rbac value is not known by older servers.

Fixes: b952bcb620 ("EX-9392 sec: add server_upcall rbac role")
Fixes: b5e421625b ("EX-9392 sec: use dedicated INTERNAL upcall cache")
Test-Parameters: trivial
Test-Parameters: testgroup=review-dne-part-2
Test-Parameters: testgroup=review-dne-part-2 serverversion=EXA6.3.0
Signed-off-by: Sebastien Buisson <sbuisson@ddn.com>
Change-Id: I39a69904ce4709eacf6f08173d3cfe42e247b5bd
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/55088
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>