### 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
print_line(vformat("Trying to convert\t%d/%d file - \"%s\" with size - %d KB", i + 1, collected_files.size(), file_name.trim_prefix("res://"), file_size / 1024));
		Vector<String> reason;
		bool is_ignored = false;
		uint64_t start_time = Time::get_singleton()->get_ticks_msec();
		if (file_name.ends_with(".shader")) {
			DirAccess::remove_file_or_error(file_name.trim_prefix("res://"));
			file_name = file_name.replace(".shader", ".gdshader");
		
		if (file_size < uint64_t(maximum_file_size)) {
			// ".tscn" must work exactly the same as ".gd" files because they may contain built-in Scripts.
			if (file_name.ends_with(".gd")) {
				rename_classes(lines, reg_container); // Using only specialized function.
				rename_common(enum_renames, reg_container.enum_regexes, lines);
				rename_cors(lines, reg_container); // Require to additional rename.
				rename_common(gdscript_function_renames, reg_container.gdscript_function_regexes, lines);
				rename_gdscript_functions(lines, reg_container, false); // Require to additional rename.
				rename_common(project_settings_renames, reg_container.project_settings_regexes, lines);
				rename_gdscript_keywords(lines, reg_container);
				rename_common(gdscript_properties_renames, reg_container.gdscript_properties_regexes, lines);
				rename_common(gdscript_signals_renames, reg_container.gdscript_signals_regexes, lines);
				rename_common(shaders_renames, reg_container.shaders_regexes, lines);
				rename_common(builtin_types_renames, reg_container.builtin_types_regexes, lines);
				custom_rename(lines, "\\.shader", ".gdshader");
			 else if (file_name.ends_with(".tscn")) {
				rename_classes(lines, reg_container); // Using only specialized function.
				rename_common(enum_renames, reg_container.enum_regexes, lines);
				rename_cors(lines, reg_container); // Require to do additional renames.
				rename_common(gdscript_function_renames, reg_container.gdscript_function_regexes, lines);
				rename_gdscript_functions(lines, reg_container, true); // Require to do additional renames.
				rename_common(project_settings_renames, reg_container.project_settings_regexes, lines);