Add debugging helpers for std::string_view,
std::basic_string_view and std::u16string_view
and add a corresponding dumper test for them.
With this in place, values of the local variables in the
"string_view.cpp" sample program from QTCREATORBUG-25865 are
shown as expected on both, Linux with GDB or LLDB and with
an MSVC build with CDB on Windows.
Fixes: QTCREATORBUG-25865
Change-Id: If8959e3225d9ce7f427a65ff6f1f134d3ad48e91
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
941ad80d60