info_test: explicitly check RunCount and RunTime fields availability
info_test: explicitly check RunCount and RunTime fields availability

TestStats flaked here:
https://ebpf.semaphoreci.com/jobs/40a1735f-1281-49b3-b352-73881e04a8d5#L2912-L2913
and it wasn't clear whether runtime info was available or not.
Would be nice to see the difference in case this happens again.

Signed-off-by: Timo Beckers <98c2d5a1e48c998bd9ba9dbc53d6857beae1c9bd@isovalent.com>

cilium/ebpf,cilium/ebpf