Provide a metric for cohort nominal quota and borrowing limit

[mszadkow]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Extend metrics to cohort level.

Add metrics for nominal quota nad borrowing limit.

Which issue(s) this PR fixes:

Relates to #7539

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mszadkow
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[k8s-ci-robot]

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

Test name	Commit	Details	Required	Rerun command
pull-kueue-verify-main	3d52cb6	link	true	/test pull-kueue-verify-main

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[mimowo]

/assign @IrvingMg
ptal for the manual pass