Verifies that XSLT Processing Instruction deprecation issue is created
Inspector issue: {
    issue : {
        code : DeprecationIssue
        details : {
            deprecationIssueDetails : {
                affectedFrame : {
                    frameId : <string>
                }
                sourceCodeLocation : {
                    columnNumber : 0
                    lineNumber : -1
                    url : http://127.0.0.1:8000/inspector-protocol/resources/xsltpi.xml
                }
                type : XSLT
            }
        }
    }
}