Product Telemetry for Number of Data Plane Pods

[mpstefan]

As a maintainer of NGF
I want to know how many data plane pods each participating cluster is scaled to
I also want to know how many NginxProxy resources are attached to a Gateway
So that I understand how large our users environments are so that I can prioritize features based on NGF scaling appropriately
And so that I understand how common it is for users to customize the NGINX data plane per Gateway

Acceptance

• The number of data plane pods is sent via product telemetry.
• The number of NginxProxy CRD are attached to a gateway is sent via product telemetry.
• The number of NGF pods is updated to capture the number of control planes.