Make all alerts/rules compatible with multicluster mode

[aruniiird]

Added 'managedBy' label to all the expressions to avoid any conflicting results.
These changes make sure that we don't have any 'PrometheusRuleFailures' in a multicluster mode scenario

[umangachapagain]

• Are these rules tested on a multicluster setup?
• Is there any difference in output after this change?

[aruniiird]

• Are these rules tested on a multicluster setup?

Tested all the queries on a normal (single mode) internal cluster.
Will check on a multicluster scenario.

• Is there any difference in output after this change?

Many queries, which are changed here, won't be working properly in a multicluster mode. So now, with the changes, all the queries are supposed to give proper output (without triggering any PrometheusAlertFailure errors).
All the output will be backward compatible as all the existing fields will still be there.

[aruniiird]

• Are these rules tested on a multicluster setup?

Now all the query changes are tested with multicluster setup and with single aws cluster.
No issues found

• Is there any difference in output after this change?

Now, where ever possible, we are getting the external cluster results as well. An example screenshot is given below,

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aruniiird, umangachapagain

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [umangachapagain]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment