[Tech Debt] General Rainy Day Improvments

[mallardduck]

This issue captures a list of various areas to consider improving or specific tasks that should be done eventually:

• Allow our team to apply all (even broken) patching in one make patch execution, (Needs a new charts build script feature)
  • Added here: Add a "soft-errors" mode for prepare subcommand charts-build-scripts#165 (Use dev-prepare or dev-prepare-cached)
• Investigate better methods to maintain the "project monitoring specific grafana" sub-chart
• Consider maintaining each sub-chart as it's own top level package (i.e. package/rancher-grafana/{Major.Minor Version}/package.yaml
• Consider de-duplication method for rarely changing rancher-project-monitoring root chart, (Maybe a feature to charts build scripts)