Provide a mechanism for propagating the request id (outgoing requests)

[DawidNiezgodka]

Even after setting up an MDC, we still need a way to propagate the request-id further in case of outgoing requests.
Example: When the mirror receives a request, we set a header with the request-id. However, when the mirror sends a request to the gateway, it creates a new request, which does not have access to the previously set request id. Thus, we need a mechanism to propagate the initial request-id.