fix: list is missing index parameter

[AlinsRan]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Documentation
• Refactor
• Chore
• CI/CD or Tests

What this PR does / why we need it:

The list option is not set, resulting in it always listing all resources instead of the target resource.

For example, if unrelated endpoints undergo changes, it will still result in full resource synchronization.

apisix-ingress-controller/internal/controller/gatewayproxy_controller.go

Lines 165 to 175 in c9ead0e

	func (r *GatewayProxyController) listGatewayProxiesForProviderEndpointSlice(ctx context.Context, obj client.Object) (requests []reconcile.Request) {
	endpointSlice, ok := obj.(*discoveryv1.EndpointSlice)
	if !ok {
	r.Log.Error(errors.New("unexpected object type"), "failed to convert object to EndpointSlice")
	return nil
	}
	return ListRequests(ctx, r.Client, r.Log, &v1alpha1.GatewayProxyList{}, client.MatchingFields{
	indexer.ServiceIndexRef: indexer.GenIndexKey(endpointSlice.GetNamespace(), endpointSlice.Labels[discoveryv1.LabelServiceName]),
	})
	}

Fix: https://github.com/apache/apisix-ingress-controller/actions/runs/16991058624/job/48260767515

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first