The target destination address is set in the `:authority` header, and additional headers can be included as well.
Currently, only HTTP/2 is supported, though HTTP/1.1 and HTTP/3 are planned.

Currently, SNI is not set by Istio clients and ignored by Istio servers.
This makes identifying which certificate to use problematic for Ztunnel.

  // a direct binding between Ingress controller and Ingress resources. Newly
  // created Ingress resources should prefer using the field. However, even
  // though the annotation is officially deprecated, for backwards compatibility
  // reasons, ingress controllers should still honor that annotation if present.
  // +optional
  optional string ingressClassName = 4;