[WIP] Update monitoring and add all dashboards

[tnozicka]

Description of your changes:
TODO

Which issue is resolved by this Pull Request:
Resolves #1505

/cc

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In response to this:

Description of your changes:
TODO

Which issue is resolved by this Pull Request:
Resolves #1505

/cc

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[scylla-operator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tnozicka

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[scylla-operator-bot]

@tnozicka: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/verify	6a8ef94	link	true	/test verify
ci/prow/e2e-gke-parallel-clusterip	6a8ef94	link	true	/test e2e-gke-parallel-clusterip
ci/prow/e2e-gke-parallel	6a8ef94	link	true	/test e2e-gke-parallel

Full PR test history. Your PR dashboard.

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