EnvoyPatchPolicy for listener in draining_state

*Description*:
> I need to apply `EnvoyPatchPolicy` to a listener like

```yaml
apiVersion: gateway.envoyproxy.io/v1alpha1
kind: EnvoyPatchPolicy
metadata:
name: keep-escaped-slashes
namespace: esrp
spec:
type: JSONPatch
targetRef:
group: gateway.networking.k8s.io
kind: Gateway
name: couchdb
jsonPatches:
- name: esrp/couchdb/http-couchdb
type: type.googleapis.com/envoy.config.listener.v3.Listener
operation:
op: replace
path: /default_filter_chain/filters/0/typed_config/path_with_escaped_slashes_action
value: KEEP_UNCHANGED
```
EPP status show
```yaml
status:
ancestors:
- ancestorRef:
group: gateway.networking.k8s.io
kind: Gateway
name: couchdb
namespace: esrp
conditions:
- lastTransitionTime: "2025-12-01T18:07:46Z"
message: Policy has been accepted.
observedGeneration: 1
reason: Accepted
status: "True"
type: Accepted
- lastTransitionTime: "2025-12-01T18:07:46Z"
message: Patches have been successfully applied.
reason: Programmed
status: "True"
type: Programmed
controllerName: gateway.envoyproxy.io/gatewayclass-controller
```
When I check the envoy dumped config, I see policy applied to the socket in `active_state`, but not applied to the socket in `draining_state`.

For my use case, this will not allow the application to function properly when envoy worker is placed in draining mode.

Could you apply EPP to listeners in `draining_state` also.