Hide the 'template magic' to implement Q_WEAK_OVERLOAD from the
documentation. So far Q_WEAK_OVERLOAD void foo() lead to
template <typename> void foo()
in the generated documentation, which is arguably confusing to the
uninitiated. And people interested in implementation details & exact
overload resolution will arguably just read the .h files themselves.
Fixes: QTBUG-104851
Pick-to: 6.4 6.3 6.2 5.15
Change-Id: I5e0b1b337b28e621e6a627241aa8037da0a879a7
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
f71aeea932