Update for LibPack3 (#10337)

* cMake: Add base support for LibPack3

Minor changes to FreeCAD source code to support compiling with Qt 6.5 on MSVC,
and changes to cMake setup to support the new Libpack.

* NETGENPlugin: Fix compilation with MSVC and OCCT 7.8

* Material: Switch to Wrapped_ParseTupleAndKeywords for /fpermissive- on MSVC

* Base: Prevent accidental definition of MIN and MAX by MSVC

* cMake: Prevent accidentally finding an old LibPack

* Material: Wrap another ParseTuple call

* OCCT: Modify includes for 7.8.x

* Part: Change TNP code to use Wrapped_ParseTupleAndArgs

* Spreadsheet: Workaround for MSVC macro pollution

* Mesh: Workaround for MSVC macro pollution

* Base: Remove extra MSVC flag (moved to CMake)

* Tests: Fix compiling with /permissive-

* FEM: Fix Qt warnings about duplicate element names

* cMake: Ensure major version numbers are set

* Address review comments.

* cMake: Further tweaks for LibPack3

* cMake: Modify specification of compiler flags for MSVC

* Main: Remove QtQuick testing code

* cmake: Find Boost before SMESH (which uses it)

* Fixes for LibPack2

* cMake: Another try at importinhg VTK cleanly

src/Base/ParameterPy.cpp

@@ -592,7 +592,7 @@ Py::Object ParameterGrpPy::setString(const Py::Tuple& args)
 Py::Object ParameterGrpPy::getString(const Py::Tuple& args)
 {
     char* pstr = nullptr;
-    char* str = "";
+    const char* str = "";
     if (!PyArg_ParseTuple(args.ptr(), "s|s", &pstr, &str)) {
         throw Py::Exception();
     }