feat(meshcircuitbreaker): supplement HealthyPanicThreshold property

[Icarus9913]

Motivation

We should supplement HealthyPanicThreshold property in MeshCircuitBreaker policy OutlierDetection section

Implementation information

Introduce a new HealthyPanicThreshold property for MeshCircuitBreaker policy, and its type is *intstr.IntOrString just like what we did in MeshHealthCheck policy

• unit test
• e2e test
• verify the MeshCircuitBreaker HealthyPanicThreshold overwrite the MeshHealthCheck's

Supporting documentation

Fix #11704

[github-actions]

Reviewer Checklist

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• Is the PR title satisfactory? Is this part of a larger feature and should be grouped using > Changelog?
• PR description is clear and complete. It Links to relevant issue as well as docs and UI issues
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as an image registry)
• IPv6 is taken into account (.e.g: no string concatenation of host port)
• Tests (Unit test, E2E tests, manual test on universal and k8s)
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[lukidzi]

Can we move it to pkg/util/proto/types.go ? We have all the Envoy structures there