What does this implement/fix?

Do not take the not-filtered shortcut if one of the magic upstream={blocklist,cache} is selected via GET parameter. This is currently broken as detection of ongoing filtering is through variable binding to the SQL string. However, these two special upstreams work by using the IN operator which does not support binding to a prepared statement.

Related issue or feature (if applicable): https://discourse.pi-hole.net/t/incorrect-number-of-pages-in-query-log-if-only-blocked-domains-are-displayed/72622

Pull request in docs with documentation (if applicable): N/A

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