Add Validators and Transformers

[bfoley13]

Description

Add Validators and Transformers into the DraftConfig GetVariableValue logic. This will allow validating and transforming variable input based on the defined kind within the DraftConfig.

Added ConditionalRef onto the BuilderVar, which can act as a reference to another variable that can affect the validation and transformation of the associated variable.

Migrated the rest of the templates and added some more validation on the template names.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Refactor

How Has This Been Tested?

Provide instructions so we can reproduce, and list any relevant details for your test configuration. Please mention if this is a breaking change which will impact consuming tool(s).

• Unit Test:
• E2E Test:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[Vidya2606]

lgtm