Load and calculate Destination of files for `kustomize localize`

[annasong20]

Implement locLoader, which loads and calculates destination paths of files for new command kustomize localize.

[k8s-ci-robot]

Hi @annasong20. Thanks for your PR.

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[k8s-ci-robot]

@annasong20: This PR has multiple commits, and the default merge method is: merge. You can request commits to be squashed using the label: tide/merge-method-squash

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[annasong20]

/label tide/merge-method-squash

[natasha41575]

/ok-to-test

[natasha41575]

/cc @yuwenma /uncc @phanimarupaka /uncc @mortent

@yuwenma Would you be able to take a look as well? It will be helpful to have another pair of eyes on these PRs

[annasong20]

Partially inspired by https://github.com/kubernetes-sigs/kustomize/pull/4652#discussion_r940546360, I removed the logic that calculates the destination path from LocLoader. This is because it violates a separation of concerns. I realized that as a result of that logic,

1. LocLoader couldn't be used to Load kustomization files using localize constraints
2. the code was more difficult to read

I will put this logic into the next layer, Localizer. Hopefully this change improves readability!!

[annasong20]

Rebased

[natasha41575]

Please rebase to rerun the CI

[natasha41575]

/lgtm /approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: annasong20, natasha41575

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[natasha41575]

/test all