Deduplicate parameters via references

[sttts]

Parameters are large part of the Kubernetes OpenAPI v2 spec. This PR moves parameter definition into the global parameters section of the spec. It also add deconflicting (renaming) support on spec merge if parameters of the same name differ.

As renaming in deconflicting might create noise, we make parameter names mostly unique through name-<base64(sha224(parameter-json))[:8]>. So the deconflicting is still in place as there might be conflicts. But in practice this probably won't happen.

Proof PR https://github.com/kubernetes/kubernetes/pull/118204

[sttts]

/assign @Jefftree @apelisse

[apelisse]

I don't know if I have anything, I haven't given a deep deep look, @Jefftree can I leave it to you?

[Jefftree]

I don't know if I have anything, I haven't given a deep deep look, @Jefftree can I leave it to you?

Of course

[Jefftree]

/lgtm /approve /hold

One small nit for comment typo, not really blocking so feel free to merge and follow up if it's more convenient.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Jefftree, sttts

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes/kube-openapi/blob/master/OWNERS)~~ [Jefftree,sttts] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[sttts]

/hold cancel

[Jefftree]

/lgtm