Wrong validation for permanent-redirect and temporal-redirect annotation values

[N4SoftwareNinja]

Hi everyone,

I think in this file there is a wrong validator for the values of permanent-redirect and temporal-redirect annotation used.

Reasoning: It should be possible to use variables like "$request_uri" for redirecting to the same path as in the original request for example, but this is blocked by the validation because the $ is not allowed.
If I use a configuration-snippet with the following content, it works fine:

return 301 https://wheelscompany.com/$request_uri;

So for me it looks like if URLWithNginxVariableRegex should be the correct Regex to be used at this point.

[k8s-ci-robot]

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