Provide alerts for monitoring the ELMS solution

[MagdaPaj]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

• If there is any problem with the ELMS, for example Edge device gets disconnected, metrics and logs will stop flowing. And there is no way to be automatically notified about it.

Expected/desired behavior

• Alerts should be created to detect that the ELMS is not reporting logs or metrics.

Mention any other details that might be useful

• The alerts could be based on the last time when InsightsMetrics or logs were reported. If that value is significantly greater than pulling interval, then the alert should be triggered.
• It would be also good to have a dashboard to help understanding potential problems with the ELMS