✨(go/v4-alpha): add new golang plugin which uses the default golang base v3 and the new alpha kustomze/v2-alpha

[NikhilSharmaWe]

Motivation

• Allow users to begin to use the new kustomze eaiser by just calling kubebuilder init --plugin=go/v4-alpha
• Add initial version for go/v4-alpha so that in follow-ups we can also create a go base v4 alpha plugin and begin to address changes like remove the logic to allow create v2beta1 CRDs and webhook which was removed with k8s 1.22
• Also, seems time for we in a follow up deprecate the go/v2 plugin which was created to ensure backward compatibility with the legacy layout of Kubebuilder < 3.0.0 and no longer can be updated

Closes: #2547

[camilamacedo86]

.

[camilamacedo86]

Thank you for the contribution 🥇

IHMO we need to move forward here and add the go/v4-alpha to make it easier for users to begin to experiment kustomize v4 with and we begin to support Apple Silicon.

Also, it seems time to deprecate go/v2 since we no longer can update it (it was created only to ensure the backwards compatibility)

/hold

Until others be able to also check it out

[everettraven]

/lgtm

[k8s-ci-robot]

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/lgtm

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[AlmogBaku]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AlmogBaku, camilamacedo86, everettraven, NikhilSharmaWe

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[camilamacedo86]

/hold cancel

we are good to move with this one :-)