Add dump package from k8s.io/apimachinery

[dims]

Move the dump package from k8s.io/apimachinery/pkg/util/dump to k8s.io/utils to make it available for use by other projects without requiring the full apimachinery dependency.

Example: https://github.com/kubernetes-sigs/kustomize/blob/6c8c9cc0e882d5d0a7903543216a402d355185b9/kyaml/yaml/fns.go#L854

This will make it easier to ensure k8s code itself does not have direct calls to go-spew package itself as well.

The package provides the same three utility functions for pretty-printing Go objects using spew as was there in kubernetes:

• Pretty(): multi-line indented output with disabled methods
• ForHash(): deterministic output suitable for hashing (sorted keys)
• OneLine(): compact single-line output

code is from:
https://github.com/kubernetes/kubernetes/tree/dc1ec1211e4f54064ba6dafd8aac46ac3d4379b4/staging/src/k8s.io/apimachinery/pkg/util/dump

What type of PR is this?

/kind feature

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind test
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Release note:

Adding a new dump package with 3 new methods.

[dims]

/assign @thockin @liggitt

[skitt]

/hold for review by @thockin and/or @liggitt, feel free to cancel @dims if my review is enough

I’ve checked that this is strictly identical to the files in apimachinery. +1 for making useful packages available without pulling in all the dependency tree…

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, skitt

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[liggitt]

/hold for review by @thockin and/or @liggitt, feel free to cancel @dims if my review is enough

I don't have a strong opinion either way

[dims]

/hold cancel

thanks @liggitt @skitt