feat: [NetworkServices] A new field resource_uris is added to message .google.cloud.networkservices.v1.AgentGateway (#9369)

* feat: A new field `resource_uris` is added to message `.google.cloud.networkservices.v1.AgentGateway`

PiperOrigin-RevId: 950955276

Source-Link: googleapis/googleapis@2bd52d2

Source-Link: googleapis/googleapis-gen@c1a39e7
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Author: gcf-owl-bot[bot]