Add integration tests for policy secondary authz runtime cost limit.

[benluddy]

We intentionally gave secondary authorization a high runtime cost. Only two checks per expression and 28 per policy should be allowed if that cost is being counted.

What type of PR is this?

/kind cleanup
/sig api-machinery

What this PR does / why we need it:

Adds integration tests demonstrating that we have wired up the cost calculations for the our CEL library functions and that the runtime cost budgets are being enforced.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

NONE

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[k8s-ci-robot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[benluddy]

/cc @cici37 @jpbetz

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

@benluddy: 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-kubernetes-integration	782ab05	link	true	/test pull-kubernetes-integration

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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[cici37]

/triage accepted