Bump kubebuilder version & add to tool-versions

[aidandunlop]

Is your feature request related to a problem? Please describe.
KFP Operator was built with an old version of kubebuilder, and later versions of the kubebuilder CLI fail to recognise the project:

$ kubebuilder 
Error: no plugin could be resolved with key "go.kubebuilder.io/v3" for project version "3"
Usage:
  kubebuilder [flags]

Examples:
The first step is to initialize your project:
    kubebuilder init [--plugins=<PLUGIN KEYS> [--project-version=<PROJECT VERSION>]]

<PLUGIN KEYS> is a comma-separated list of plugin keys from the following table
and <PROJECT VERSION> a supported project version for these plugins.

                             Plugin keys | Supported project versions
-----------------------------------------+----------------------------
               base.go.kubebuilder.io/v4 |                          3
 deploy-image.go.kubebuilder.io/v1-alpha |                          3
                    go.kubebuilder.io/v4 |                          3
         grafana.kubebuilder.io/v1-alpha |                          3
      kustomize.common.kubebuilder.io/v2 |                          3

For more specific help for the init command of a certain plugins and project version
configuration please run:
    kubebuilder init --help --plugins=<PLUGIN KEYS> [--project-version=<PROJECT VERSION>]

Default plugin keys: "go.kubebuilder.io/v4"
Default project version: "3"


Flags:
  -h, --help                     help for kubebuilder
      --plugins strings          plugin keys to be used for this subcommand execution
      --project-version string   project version (default "3")

FATA no plugin could be resolved with key "go.kubebuilder.io/v3" for project version "3" 

It appears version 4 of kubebuilder expects a different directory structure.

Describe the solution you'd like

• Upgrade the version of kubebuilder used (specified in the root-level PROJECT file)
• Support latest version of the kubebuilder cli

Describe alternatives you've considered

• Downgrading to a lower version of kubebuilder cli

[chr12c]

no plugin could be resolved with key "go.kubebuilder.io/v3" for project version "3"

You need to update the layout to go.kubebuilder.io/v4 the project version stays as 3

[chr12c]

the alpha plugin didn't work unfortunately.

kubebuilder alpha generate --plugins=go/v4

Looks like we will have to manually go through all of the breaking changes from 3.x to 4.x of kubebuilder.