Option to enable envoy request or response headers separately

Description:

Describe the desired behavior, what scenario it enables and how it would be used.

I would like to be able to enable envoy request headers like x-envoy-original-path so that I see the original path for URL rewritten requests in traces and access logs. There is an option in CTP called enableEnvoyHeaders which does this. However, this also enables envoy response headers which I do not want to return to clients.

Would it be possible to have separate flags in CTP for enabling request or response headers?

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Any extra documentation required to understand the issue.

Previous discussion here for context: https://github.com/envoyproxy/gateway/issues/8477#issuecomment-4050988146