Propose Softer Logging on First Deploy

[bh2smith]

On first deploy, there were some weird error logs that didn't make much sense:

Before

$ export AGENT_URL=somestuff.com
$ npx make-agent deploy -u $AGENT_URL
OpenAPI specification is valid.
[ERROR] Failed to update plugin: {"error":"Plugin not found. Please register the plugin first."}
Attempting to register plugin...
Plugin registered successfully

$ npx make-agent deploy -u $AGENT_URL
OpenAPI specification is valid.
Plugin updated successfully.

After

Logs should look like

OpenAPI specification is valid.
[WARN] Plugin with ID ${pluginId} not found/registered.
Attempting to register plugin...
Plugin registered successfully