Wire up Node-RED instance audit events to FF

[Steve-Mcl]

Description

• Adds new module lib/auditLogger/index.js for inclusing in settings.js
• Updates lib/launcher.js to update settings.json with required properties for the auditLogger module
• Updates lib/template/template-settings.js to use the new props in settings.json to load the auditLogger module
• Adds test to ensure settings.json gets the necessary property values
• Adds test to ensure settings.js loads the new module as a handler under logging.auditLogger.handler and also has the necessary properties loggingURL & token as well as the level and audit values like nr-launcher has.

Related Issue(s)

FlowFuse/flowfuse#3357

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Backport needed? -> add the backport label
• Includes a DB migration? -> add the area:migration label