[release-4.7] Fix kubebuilder installation in the build root Dockerfile

[timflannagan]

Update the base.Dockerfile and fix the kubebuilder installation. That
vanity URL is no longer correctly serving the v2.3.1 release tar.gz
file. Update to instead curl directly from the github releases URL.

Description of the change:

Motivation for the change:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /doc
• Commit messages sensible and descriptive

[openshift-ci]

@timflannagan: No Bugzilla bug is referenced in the title of this pull request.
To reference a bug, add 'Bug XXX:' to the title of this pull request and request another bug refresh with /bugzilla refresh.

In response to this:

Fix kubebuilder installation in the build root Dockerfile

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: timflannagan
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[openshift-ci]

@timflannagan: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-console-olm	883d45b	link	/test e2e-aws-console-olm
ci/prow/images	883d45b	link	/test images
ci/prow/unit	883d45b	link	/test unit
ci/prow/verify	883d45b	link	/test verify
ci/prow/e2e-aws-olm	883d45b	link	/test e2e-aws-olm
ci/prow/e2e-gcp	883d45b	link	/test e2e-gcp
ci/prow/e2e-upgrade	883d45b	link	/test e2e-upgrade

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[openshift-ci]

@timflannagan: No Bugzilla bug is referenced in the title of this pull request.
To reference a bug, add 'Bug XXX:' to the title of this pull request and request another bug refresh with /bugzilla refresh.

In response to this:

[release-4.7] Fix kubebuilder installation in the build root Dockerfile

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kevinrizza]

force merging due to permafailing ci