fix(monitorstack/ui): change xpath for panel searching
fix(monitorstack/ui): change xpath for panel searching

Grafana changed the header element attributes.
This was found in branch-3.9 (monitoring version 3.9.1)

Fix xpath for searching panel on dashboard

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests