feat: policy spans and tracking merging policies

[KevFan]

Description

Closes: https://github.com/Kuadrant/kuadrant-operator/issues/1685 https://github.com/Kuadrant/kuadrant-operator/issues/1688

Verification

• Checkout this branch
• Setup cluster

docker compose -f examples/otel/docker-compose.yaml up -d
make local-env-setup
Set environment variables
export OTEL_ENABLED=true                                                     
export OTEL_EXPORTER_OTLP_ENDPOINT=localhost:4318                                                                                
export OTEL_METRICS_INTERVAL_SECONDS=5        

# Run the operator
make run

• Run through some user guides such as https://github.com/Kuadrant/kuadrant-operator/blob/main/doc/user-guides/auth/auth-for-app-devs-and-platform-engineers.md
• Check traces and spans in jaegar - http://localhost:16686/search