Resources Monitor Plugin doesn't have enough permissions to read Pod information on Hosted Che

[svor]

Describe the bug

It's continuation of eclipse-che/che-theia#919.

On Hosted Che instance we can't get information about the workspace's pod from the theia plugin by using k8s API. Looks like there is not enough permissions for service account.

2021-01-13 14:07:52.629 root ERROR [hosted-plugin: 46] With stack trace: Error: Cannot read Pod information. Status code: 403. Error: {"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"pods \"workspacegdve9us4ad860vrl.go-cli-85c4d6d888-mb7bc\" is forbidden: User \"system:serviceaccount:vsvydenk-che:che-workspace\" cannot get resource \"pods\" in API group \"\" in the namespace \"vsvydenk-che\"","reason":"Forbidden","details":{"name":"workspacegdve9us4ad860vrl.go-cli-85c4d6d888-mb7bc","kind":"pods"},"code":403}

    at ResMon.<anonymous> (/tmp/theia-unpacked/eclipse_che_resource_monitor_plugin.theia/lib/resource-monitor-plugin.js:119:35)
    at step (/tmp/theia-unpacked/eclipse_che_resource_monitor_plugin.theia/lib/resource-monitor-plugin.js:42:23)
    at Object.next (/tmp/theia-unpacked/eclipse_che_resource_monitor_plugin.theia/lib/resource-monitor-plugin.js:23:53)
    at fulfilled (/tmp/theia-unpacked/eclipse_che_resource_monitor_plugin.theia/lib/resource-monitor-plugin.js:14:58)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Create a workspace on Hosted instance
2. Click on the ban icon in the status bar and see a warning message.

Expected behavior

Status bar should contain an information about resources

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• dogfooding instance

Screenshots