Avoid -Wdeprecated-copy for many event classes from clang 13

Add new macros wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN_DEF_COPY() and
wxDECLARE_NO_ASSIGN_DEF_COPY() and use them instead of
wxDECLARE_DYNAMIC_CLASS_NO_ASSIGN() and wxDECLARE_NO_ASSIGN_CLASS()
respectively to ensure that we declare a (default, if possible) copy
ctor in the classes declaring an assignment operator to avoid clang
warnings about not doing it.

include/wx/defs.h

@@ -3160,8 +3160,14 @@ typedef const void* WXWidget;
 
 #if defined(__cplusplus) && (__cplusplus >= 201103L || wxCHECK_VISUALC_VERSION(14))
     #define wxMEMBER_DELETE = delete
+    #define wxDECLARE_DEFAULT_COPY_CTOR(classname) \
+        public:                                    \
+            classname(const classname&) = default;
 #else
     #define wxMEMBER_DELETE
+
+    // We can't do this without C++11 "= default".
+    #define wxDECLARE_DEFAULT_COPY_CTOR(classname)
 #endif
 
 #define wxDECLARE_NO_COPY_CLASS(classname)      \
@@ -3183,6 +3189,11 @@ typedef const void* WXWidget;
     private:                                    \
         classname& operator=(const classname&) wxMEMBER_DELETE
 
+#define wxDECLARE_NO_ASSIGN_DEF_COPY(classname)                 \
+        wxDECLARE_DEFAULT_COPY_CTOR(classname)                  \
+    private:                                                    \
+        classname& operator=(const classname&) wxMEMBER_DELETE
+
 /* deprecated variants _not_ requiring a semicolon after them */
 #define DECLARE_NO_COPY_CLASS(classname) \
     wxDECLARE_NO_COPY_CLASS(classname);