Support bypass of autoforwarding with special header

[meiliang86]

Is your feature request related to a problem? Please describe. Currently when autoforwarding is on for all apis, it would be hard to investigate standby cluster/workflow issues (because all requests goes to active cluster)

Describe the solution you'd like A clear and concise description of what you want to happen. Some way to bypass autoforwarding. This is mostly need for debugging/investigation purpose

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.