pkg/kvstore: fix TestRunLocksGC unit test
pkg/kvstore: fix TestRunLocksGC unit test

The unit test had a couple of bugs that are fixed by this commit.

Fixes: 440539b7604a ("garbage collect stale distributed locks")
Signed-off-by: André Martins <bc9800b9d52a24cce72a73dd528afed53f10e5fc@cilium.io>

michi-covalent/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,tklauser/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,cilium/cilium