Fix Add OTel Receiver After Config Apply & Fix Reload Monitoring Old Log

[aphralG]

Proposed changes

Changes to Config Apply:

• Moved nginx_config_parser.go from internal/watcher/instance to /internal/datasource/config to allow the resource plugin to also have an NginxConfigParser to parse the config
• Moved NginxPlusRuntimeInfoEqual, NginxRuntimeInfoEqual & UpdateNginxInstanceRuntime to /datasource/proto/instance.go from instance_watcher_service.go so they can be used in the ResourceService as well as the InstanceWatcherService
• ConfigApplySuccessfulTopic now sends ConfigApplySuccess which contains a NginxConfigContext as well as a DataPlaneResponse instead of just a DataPlaneResponse

      type ConfigApplySuccess struct {
       ConfigContext     *NginxConfigContext
       DataPlaneResponse *v1.DataPlaneResponse
  

• During a ConfigApply the resource service before Validating and Reloading the config will now parse the NGINX config so it can have access to any error logs that might have been added to monitor. If the validate and reload are successful it sends the NginxConfigContext created during the parse along with DataPlane Response
• Added enabled to InstanceWatcher, the instance watcher is now stopped during a config apply to stop the NginxConfigContext not being sent.
• Add new plus config to integration tests as there was problems being caused by changing the plus API to a Stub Status

Other changes made:

• Moved logger creation from app.go to when we are resolving the agent config so allowedDir, enabled features etc are logged to agent log file
• Added logs about shutting down and starting the stub status scraper
• Removed enabled function from CredentialWatcher

Checklist

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• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• 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
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13