Add conformance test for GRPCRoute traffic splitting

[pleshakov]

What would you like to be added:

A conformance test for traffic splitting in GRPCRoute -- https://github.com/kubernetes-sigs/gateway-api/blob/729d38f9bf17ff72d17f0148452416551296f67c/apis/v1alpha2/grpcroute_types.go#L271

Why this is needed:

Increase conformance feature coverage of GRPCRoute

[yashvardhan-kukreja]

Hi @pleshakov , I would love to contribute to this one. /assign

[pleshakov]

Hi @yashvardhan-kukreja

Hi @pleshakov , I would love to contribute to this one.

that's great! I'd recommend to wait until any of the maintainers replied that this issue makes sense or ask this question in the gateway api slack channel https://gateway-api.sigs.k8s.io/contributing/#communications , to double check this work is needed.

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[robscott]

I agree that this would be a useful test to have. @yashvardhan-kukreja or @pleshakov do either of you have time to work on this?

/remove-lifecycle stale