[Feature]: Add Traffic Logging

[DDH13]

Please select the area the issue is related to

Area/Policies (Policies, Policy Hub, Policy Engine etc)

Please select the aspect the issue is related to

Aspect/Logging (Log formats, instrumentation, improvements)

Description

Add an Envoy Access log to capture request response data and latencies in a customizable manner

[DDH13]

Can port https://github.com/wso2-support/apk/pull/102 and https://github.com/wso2-support/apk/pull/131