Add Web UI information to status

[glaksh100]

This PR adds the cluster and job overview URLs to the cluster and job status respectively. The objective is to provide users easy access to the required Web UI. This information can also be used in any other CI/D tooling used to support Flink applications on k8s.

Example output:

Status:
  Cluster Status:
    Available Task Slots:     1
    Cluster Overview URL:     http://localhost:8001/api/v1/namespaces/default/services/simpleflinkk8s:8081/proxy/#/overview
    Health:                   Green
    Healthy Task Managers:    1
    Number Of Task Managers:  1
    Number Of Task Slots:     2
  Deploy Hash:                18051096
  Failed Deploy Hash:
  Job Status:
    Completed Checkpoint Count:  10
    Entry Class:                 com.lyft.OperatorTestApp
    Failed Checkpoint Count:     0
    Health:                      Green
    Jar Name:                    operator-test-app-1.0.0-SNAPSHOT.jar
    Job ID:                      c669950ee11c64980180eeaf9e62a63f
    Job Overview URL:            http://localhost:8001/api/v1/namespaces/default/services/simpleflinkk8s:8081/proxy/#/jobs/c669950ee11c64980180eeaf9e62a63f
    Job Restart Count:           0

[glaksh100]

cc. @anandswaminathan @mwylde Updated this to store the ingress URL. PTAL when you have a chance.