Verifies issue creation for an invalid `Unencoded-Digest` header.
Issue reported: {
    issue : {
        code : UnencodedDigestIssue
        details : {
            unencodedDigestIssueDetails : {
                error : MalformedDictionary
                request : {
                    requestId : <string>
                    url : http://127.0.0.1:8000/inspector-protocol/resources/unencoded-digest-test.php?digest=%3F%3F%3F
                }
            }
        }
    }
}