Refactor ml-pipeline component for kustomize5

[rawc0der]

Part of the larger #2388 initiative to refactor Kubeflow apps for kustomize5.
This Issue should address fixes for the deprecated fields for the manifests/apps/pipeline/ component.

Warnings thrown before this PR:

$ kustomize build apps/pipeline/upstream/env/cert-manager/platform-agnostic-multi-user/  

# Warning: 'bases' is deprecated. Please use 'resources' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'patchesStrategicMerge' is deprecated. Please use 'patches' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'bases' is deprecated. Please use 'resources' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'patchesStrategicMerge' is deprecated. Please use 'patches' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'bases' is deprecated. Please use 'resources' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'vars' is deprecated. Please use 'replacements' instead. [EXPERIMENTAL] Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'bases' is deprecated. Please use 'resources' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'bases' is deprecated. Please use 'resources' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'patchesJson6902' is deprecated. Please use 'patches' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'bases' is deprecated. Please use 'resources' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'patchesStrategicMerge' is deprecated. Please use 'patches' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
2023/10/12 15:10:41 well-defined vars that were never replaced: kfp-app-name,kfp-app-version

Expected behaviour after refactoring the resources for kustomize is to obtain healthy set of manifests without any warnings.

Remaining Warnings (Work in progress):

 Warning: 'vars' is deprecated. Please use 'replacements' instead. [EXPERIMENTAL] Run 'kustomize edit fix' to update your Kustomization automatically.
# Warning: 'patchesJson6902' is deprecated. Please use 'patches' instead. Run 'kustomize edit fix' to update your Kustomization automatically.
2023/10/12 15:50:46 well-defined vars that were never replaced: kfp-app-version,kfp-app-name

After couple more commits I am expecting to have also refactored the remaining vars and patchesJson6902 deprecations from the rest of the resources.

Looking for feedback and a review! (@juliusvonkohout @annajung)

[rawc0der]

This PR should be linked to kubeflow/pipelines#10053 as well.

[juliusvonkohout]

kubeflow/pipelines#10087 is the new PR

[juliusvonkohout]

/close
since this is tracked in KFP

[juliusvonkohout]

/close

[google-oss-prow]

@juliusvonkohout: Closing this issue.

In response to this:

/close

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