Use the plugin to create a Helm Chart for Tutorials and Validate with them with GitHub action in the CI

[camilamacedo86]

What do you want to happen?

Currently, we are just generating the helm chart for the sample: https://github.com/kubernetes-sigs/kubebuilder/tree/master/testdata/project-v4-with-plugins

The goal of this one is to generate the helm chart for the tutorial samples under:

• docs/book/src/cronjob-tutorial/testdata/project
• docs/book/src/getting-started/testdata/project
• docs/book/src/multiversion-tutorial/testdata/project

Therefore:

• We need a new GitHub Action named test-helm-book such as the existing CI workflow for Helm sample testing as a guide: test-helm-samples.yml.
• We need to modify the hack logic to call the chart as well. Reference the existing structure and commands in hack.
• The existing target in the Makefile to allow generating only the Helm charts see Makefile Helm Target need also be updated so that when we run make generate-charts we will do for both sample under testdata and docs

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