Fix ActionController::UrlGenerationError

What does this MR do and why?

Sentry: https://sentry.gitlab.net/gitlab/gitlabcom/issues/4084018

Problem

We limit state value via Route constrains. But we don't validate the state parameter if it's provided via query parameters.

Solution

Return 404 page to match the route constrains validation.

Screenshots or screen recordings

Link to test: http://127.0.0.1:3000/gitlab-org/gitlab-test/-/branches?state=test

Before	After

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