Add ability to receive headers when consuming messages from RabbitMQ.

[plamen-kutinchev]

Add ability to receive headers when consuming messages from RabbitMQ.

[m-simeonov-sumup]

Tested on theta with an implementation

• https://github.com/sumup/antifraud-registration-event-consumer/blob/CS-1098-test-logs/internal/events/registration.go#L106 (here this change is used)
• https://grafana.sam-app.ro/goto/rw71LuhSg?orgId=1 (Rabbitmq headers in logs)

{
  "level": "debug",
  "time": "2024-02-16T12:09:24.860Z",
  "caller": "events/registration.go:107",
  "msg": "rabbitmq headers",
  "Key": "traceparent",
  "Val": "00-5f2ad928cd6c632b4c866f0b07d193d7-4226dc56c773ef4e-01"
}