Enable GatewaySecretInvalidReferenceGrant test

[arkodg]

Description:
test details in https://github.com/kubernetes-sigs/gateway-api/blob/main/conformance/tests/gateway-secret-invalid-reference-grant.yaml

Once fixed, please enable in https://github.com/envoyproxy/gateway/blob/main/test/conformance/conformance_test.go
&
https://github.com/envoyproxy/gateway/blob/main/test/conformance/experimental_conformance_test.go

Skipped in #1987

[arkodg]

this should be fixed once kubernetes-sigs/gateway-api#2494 is merged and released