Plugin connection messages are written to non-interactive query output if JSON output is enabled leading to invalid JSON

[MichaelBurgess]

Describe the bug
If you have a plugin connection that causes a message to be output to the stdout after launching steampipe (e.g. the paths must be configured message from the CSV plugin), if you run a non-interactive query session in JSON, then that message is output before the JSON, meaning the response from that is not valid JSON.

Steampipe version (steampipe -v)
Example: v0.9.1

To reproduce

• steampipe plugin install csv
• steampipe plugin install steampipe
• steampipe query "select * from steampipe_registry_plugin;" --output json

Expected behavior
Valid JSON is output