### Godot version

Godot 4.0 Beta 11

### System information

Linux Ubunutu

### Issue description

Godot's 3.x project converter to 4.0 seems to be missing the conversion for two drag data related functions.

In 3.x the function for can drop data, was named  `can_drop_data` in 4.0 it is `_can_drop_data`.
And likewise 3.x had `drop_data` and 4.0 has `_drop_data`.

These two functions were not converted by the project converter (and were hard to notice)!


### Steps to reproduce

Convert a 3.x project to 4.0 with the functions: `can_drop_data` it will not convert to `_can_drop_data` nor `drop_data` to `_drop_data`.



### Minimal reproduction project

N/A
{
		HashSet<String> all_functions;
		// List of excluded functions from builtin types and gbal namespace, because currently it is not psible to get list of functions from them.
		// This will be available when https://github.com/godotengine/godot/pull/49053 or similar will be included into Godot.
		static const char *builtin_types_excluded_functions[] = { "dict_to_inst", "inst_to_dict", "bytes_to_var", "bytes_to_var_with_objects", "db_to_linear", "deg_to_rad", "linear_to_db", "rad_to_deg", "randf_range", "snapped", "str_to_var", "var_to_str", "var_to_bytes", "var_to_bytes_with_objects", "move_toward", "uri_encode", "uri_decode", "remove_at", "get_rotation_quaternion", "clamp", "grow_side", "is_absolute_path", "is_valid_int", "lerp", "to_ascii_buffer", "to_utf8_buffer", "to_utf32_buffer", "snapped", "remap", "rfind",  ;
		for (int current_index = 0; builtin_types_excluded_functions[current_index]; current_index++) {
			all_functions.insert(builtin_types_excluded_functions[current_index]);
		
		//			for (int type = Variant::Type::NIL + 1; type < Variant::Type::VARIANT_MAX; type++) {
		//				List<MethodInfo> method_list;
		//				Variant::get_method_list_by_type(&method_list, Variant::Type(type));
		//				for (MethodInfo &function_data : method_list) {
		//					if (!all_functions.has(function_data.name)) {
		//						all_functions.insert(function_data.name);
		//					
		/
		//			
		LiingName> classes_list;
		ClassDB::get_class_list(&classes_list);
		for (StringName &name_of_class : classes_list) {
			List<MethodInfo> method_list;
			ClassDB::get_method_list(name_of_class, &method_list, true);
			for (MethodInfo &function_data : method_list) {
				if (!all_functions.has(function_data.name)) {
					all_functions.insert(function_data.name);