feat: Add VirtualServerRoute Label Selectors to NIC

[AlexFenlon]

Proposed changes

implementation PR : nginx/kubernetes-ingress#8936

Adds an option to dynamically add VirtualServerRoutes onto a VirtualServer by using RouteSelector labels to connect them instead of it being explicitly said in the VirtualServer

Checklist

Before sharing this pull request, I completed the following checklist:

• I read the Contributing guidelines
• My branch adheres to the Git conventions
• My content changes adhere to the F5 NGINX Documentation style guide
• If my changes involve potentially sensitive information¹, I have assessed the possible impact
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Footnotes

1. Potentially sensitive information includes personally identify information (PII), authentication credentials, and live URLs. Refer to the style guide for guidance about placeholder content. ↩

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