Implement apis to set and get the name of a wasm module (#3254)

Add API wasm_runtime_set_module_name and wasm_runtime_get_module_name,
and by default, a module's name is "" if the set module name api isn't called.

core/iwasm/interpreter/wasm.h

@@ -1048,6 +1048,9 @@ struct WASMModule {
     bool is_ref_types_used;
     bool is_bulk_memory_used;
 #endif
+
+    /* user defined name */
+    char *name;
 };
 
 typedef struct BlockType {