Add the possibility to pass QAnyStringView and QUtf8StringView to QStringBuilder operator%

I think it would be useful to able to use QAnyStringView and QUtf8StringView while concatenating strings with operator%. The following code doesn't compile:

void processStrings(QAnyStringView str1, QUtf8StringView str2)
{
     QString str = str1 % str2;
}

Or is there any fundamental reason for this not being available yet?