[C++] Explicitly define copy constructor for AnyBase

Gcc 14.2 generates a warning (-Wdeprecated-copy) for AnyBase because the assignment operator is defined explicitly but the copy constructor is defined implicitly.

include/cantera/base/AnyMap.h

@@ -34,6 +34,7 @@ namespace Cantera
 class AnyBase {
 public:
     AnyBase() = default;
+    AnyBase(const AnyBase& other) = default;
     virtual ~AnyBase() = default;
     AnyBase& operator=(const AnyBase& other);