Network Traffic menu is not available in RHOCP web console

Issue

• After creating flowcollector CR for Network Observability operator, Network Traffic menu is not available in Observe section of OpenShift web console.

• Console pods are streaming below errors in openshift-console project:

  2023-06-26T20:59:59.253821983Z E0626 20:59:59.253757       1 handlers.go:165] GET request for "netobserv-plugin" plugin failed: Get "https://netobserv-plugin.netobserv.svc.cluster.local:9001/plugin-manifest.json": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
  2023-06-26T21:00:19.574293537Z E0626 21:00:19.574244       1 handlers.go:165] GET request for "netobserv-plugin" plugin failed: Get "https://netobserv-plugin.netobserv.svc.cluster.local:9001/plugin-manifest.json": dial tcp 171.29.75.249:9001: i/o timeout (Client.Timeout exceeded while awaiting headers)