(testing): Update testdata generation and testing logic

[everettraven]

Description of the change:

• Updates testdata generation to use a new library implemented in this PR for scaffolding out a phase 1.5 plugin without building it into a build of the operator-sdk or kubebuilder.
• Generates new testdata
• Updates e2e tests to generate new testdata on the fly and use the helpers from the new library added
• Added a new library to help with generating testdata for phase 1.5 plugins and generalize some of the commonly used logic for testing the sample operators.

Motivation for the change:

• Update the testdata generation and e2e testing logic to ensure we are properly testing the phase 1.5 plugin implementation

Checklist

If the pull request includes user-facing changes, extra documentation is required:

• [ ] Add a new changelog fragment in changelog/fragments (see changelog/fragments/00-template.yaml)
• [ ] Add or update relevant sections of the docs website in website/content/en/docs