Update qdoc and qtattributionsscanner to the latest version from
qttools/dev.
qtattributionsscanner is updated to a version that supports multiline
copyright entries as a string array.
Task-number: QTBUG-111873
Pick-to: 6.6 6.5
Change-Id: I7dccdd431015610dcead220fa4cf3b5640049ece
Reviewed-by: Kai Köhne <kai.koehne@qt.io>