[charts-build-scripts] technical debt of charts-build-scripts

[nicholasSUSE]

Scope

The charts-build-scripts repo is now owned by the release team.

It is an ancient and legacy code with few portions of new code.

This repository handles 2 specific responsibilities across several features:

• Charts generation and development work
• Charts release process

The release-team has higher standards of go code quality therefor the charts-build-scripts must be improved.

Tasks

• Remove the pkg directory
• Scope lock all err values
• Use 0 value declaration
• Unexport all exposed symbols that don't need to be
• Condense the packages down to what is necessarily needed for APIs
• Update file names to conform with standards