Proposed changes

Update the dynamic config file with the features received in the AgentDetails message. Proposed list of features planned to be supported:

• registration
• nginx-config
• nginx-ssl-config
• nginx-counting
• metrics (core)
• metrics-throttle
• dataplanestatus
• process-watcher
• file-watcher
• activity-events

These changes will be used to support feature toggling where different use cases are enabled/disabled based on the feature list either in the nginx-agent.conf file or through the Proto Command populating the AgentDetails message.
For example, a client can opt out of uploading their nginx-config or the ssl information present in their nginx-config

This initial PR will focus on nginx-config and nginx-ssl-config use cases.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md)