### 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
.window_fullscreen = a -> if a: DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN) else: DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
	tains("window_fullscreen")) {
		line = reg_container.reg__fullscreen.sub(line, "if $1:\n\tDisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN)\nelse:\n\tDisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)", true);
	
	// Instantiate
	tains("instance")) {
		line = reg_container.reg_instantiate.sub(line, ".instantiate($1)", true);
	
	// -- r.move_and_slide( a, b, c, d, e )  ->  r.set_vecity(a) ... r.move_and_slide()         KinematicBody
	tains(("move_and_slide("))) {
		int start = line.find("move_and_slide(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			String base_obj = get_object_of_execution(line.substr(0, start));
			String starting_space = get_starting_space(line);
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() >= 1) {
				String line_new;
				// motion_vecity
				line_new += starting_space + base_obj + "set_vecity(" + parts[0] + ")\n";
				// up_direction
				.size() >= 2) {
					line_new += starting_space + base_obj + "set_up_direction(" + parts[1] + ")\n";
				
				// stop_on_spe
				.size() >= 3) {
					line_new += starting_space + base_obj + "set_for_stop_on_spe_enabled(" + parts[2] + ")\n";
				
				// max_slides