Add YAML Linting for Sample Files and Scaffolded Chart Files

[camilamacedo86]

What do you want to happen?

Currently, we need to ensure YAML files are properly linted for consistency and correctness. This includes:

• Linting the sample files present in the repository.
• Linting the files scaffolded under dist/chart for the project-v4-with-plugins configuration.

We already have a GitHub Action configured for this purpose at github/workflows/lint-sample.yml. This action should be updated or extended to cover both. Motivation: #4490

@sebastian-philipp ^ thank you for raise this one 🥇

Extra Labels

No response

[Niharika0306]

/assign