Simplify ZUGFeRD Report Integration

[pri-kise]

Summary

This PR simplifies the custom report integration for ZUGFeRD Export

A partner now only needs to add the following snippet to their custom sales invoice / credit memo report for the ZUGFeRD xml.

    trigger OnPreRendering(var RenderingPayload: JsonObject)
    begin
        AddXMLAttachmentforZUGFeRDExport(RenderingPayload);
    end;

    local procedure AddXMLAttachmentforZUGFeRDExport(var RenderingPayload: JsonObject)
    var
        ExportZUGFeRDDocument: Codeunit "Export ZUGFeRD Document";
    begin
        if CurrReport.TargetFormat() <> ReportFormat::PDF then
            exit;

        if not ExportZUGFeRDDocument.IsZUGFeRDPrintProcess() then
            exit;

        ExportZUGFeRDDocument.CreateAndAddXMLAttachmentToRenderingPayload(Header, RenderingPayload);
    end;

Work Item(s)

Fixes #29541

Fixes AB#617052