Test Plan [Inspectable Multi-Stage Transformations with Standard Kustomize Tools]

[istein1]

Test Plan [Inspectable Multi-Stage Transformations with Standard Kustomize Tools] doc

For test case #2A, issue #72
For test case #2B, issue #324

[github-actions]

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[aufi]

Updated internal google doc test plan and added PR with transform docs update with more details on the multistage transform features #307