feat: add go module redirect for k8s-operator

[dmolik]

Description

the Golang import path for the new valkey-operator is valkey.io/valkey-operator this patch wires up a redirect to use the patch but also keep the code within GitHub.

Issues Resolved

Check List

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By submitting this pull request, I confirm that my contribution is made under the terms of the BSD-3-Clause License.

[stockholmux]

@dmolik So it looks like you don't actually need any of the rest of the template and this page wouldn't really be visited by humans?

If so, I think a more elegant way of doing this would be to create a standalone go-forwarding template that doesn't rely on the existing templates but has the two meta tags you need for Golang.

As-is would work but we're trying to gently optimize for a nice quick build process - this conditional would be evaluated on every page of the website - we can handle it today but too many of these tech debt over time.