Ability to turn off agent instrumentation

When running APM agents to instrument an application, we should provide a way for the agents to stop/pause instrumentation when it detects that the application it is instrumenting is under heavy load and is running short on resources(reaching memory exhaustion).

We should consider allowing customers to:

- Set a resource utilization limit.
- A way to enable/disable agent configuration from central config.
- Automated way to detect utilization limit has been reached and turn off agent to prevent any additional overhead on the service/application.