Update build system related information for Qt 6.0

• Type: User Story
• Resolution: Unresolved
• Priority: P2: Important
• Fix Version/s: None
• Affects Version/s: None
• Component/s: Documentation
• Labels:

  None

For Gerrit Dashboard: QTBUG-87040
#	Subject	Branch	Project	Status	CR	V
315766,10	Update Build with CMake documentation to Qt 6	dev	qt/qtdoc	Status: MERGED	+2	0
365354,14	Rewrite Qt Resource System overview	dev	qt/qtbase	Status: MERGED	+2	0
371331,2	Rewrite Qt Resource System overview	6.2.0	qt/qtbase	Status: MERGED	+2	0
371332,2	Rewrite Qt Resource System overview	6.2	qt/qtbase	Status: MERGED	+2	0
427533,2	Doc: Remove qmake-only reference in Q_IMPORT_PLUGIN description	dev	qt/qtbase	Status: MERGED	+2	0
427550,2	Doc: Generalize info about -rdynamic to be not qmake specific	dev	qt/qtbase	Status: MERGED	+2	0
428661,2	Doc: Generalize info about -rdynamic to be not qmake specific	6.4	qt/qtbase	Status: MERGED	+2	0
428662,2	Doc: Remove qmake-only reference in Q_IMPORT_PLUGIN description	6.4	qt/qtbase	Status: MERGED	+2	0