Description:

What issue is being seen? Describe what should be happening instead of
the bug, for example: The expected value isn't returned, etc.

Definition is here https://github.com/envoyproxy/gateway/blob/75f42e5cb8c1e802ebd2f83052e123e292daa7cb/internal/ir/xds.go?plain=1#L1221

This should be converted into a slice of structs to retain order

Repro steps:

Include sample requests, environment, etc. All data and inputs
required to reproduce the bug.

Note: If there are privacy concerns, sanitize the data prior to
sharing.

Environment:

Include the environment like gateway version, envoy version and so on.

Logs:

Include the access logs and the Envoy logs.