Add kubeflow trainer step operator#3879

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AlexejPenner wants to merge 4 commits intodevelopfrom

feature/add-kubeflow-trainer-step-operator

Commits on Jul 9, 2025

Initial implementation
AlexejPenner
committed

Commits on Jul 30, 2025

Add version 0.84.0 to legacy docs (#3863)

authored and
schustmi
committed

Commits on Aug 4, 2025

Merge branch 'main' into feature/add-kubeflow-trainer-step-operator
AlexejPenner
committed

Commits on Aug 5, 2025

Adjusted to new boolean step decorator
AlexejPenner
committed