Description:

Describe the issue.

Add support for rateLimitHPA in the EnvoyGateway API https://gateway.envoyproxy.io/docs/api/extension_types/#envoygatewaykubernetesprovider similar to what exists for EnvoyProxy https://gateway.envoyproxy.io/docs/api/extension_types/#envoyproxykubernetesprovider

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