Use new grpc metrics and trace version of otel

[mehdihadeli]

• using grpc.StatsHandler instead of interceptors for tracing and metrics in grpc
• Upgrade to open-telemetry/opentelemetry-go-contrib version v0.45.0
• https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v1.20.0
• https://github.com/open-telemetry/opentelemetry-go-contrib/blob/main/instrumentation/google.golang.org/grpc/otelgrpc/doc.go