Add outlier detection for circuit breaking

[AmaliMatharaarachchi]

Describe your problem(s)

When upstream goes down completely or upstream is not reliable, then we have to be able to eject them from the cluster rotation completely for a period of time. This is somewhat similar to the ballerina circuit breaker. https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/cluster/v3/outlier_detection.proto#config-cluster-v3-outlierdetection

related to https://github.com/wso2/product-microgateway/issues/2320

Describe your solution

How will you implement it

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