Always use vendor in CMake-built DLLs regardless of version

The vendor string was ignored for the stable wxWidgets versions (e.g.,
3.2). However, vendor should be always used when available, regardless
of wxWidgets version. The only case when vendor should not be used is
when creating official builds (currently not done with CMake).

Closes #22931.

build/cmake/functions.cmake

@@ -212,7 +212,7 @@ function(wx_set_target_properties target_name)
     if(wxCOMPILER_PREFIX)
         wx_string_append(dll_suffix "_${wxCOMPILER_PREFIX}")
     endif()
-    if(wxBUILD_VENDOR AND wxVERSION_IS_DEV)
+    if(wxBUILD_VENDOR)
         wx_string_append(dll_suffix "_${wxBUILD_VENDOR}")
     endif()