### 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
line = line.substr(0, start) + "tween_method(Callable(" + parts[0] + "," + parts[1] + ").bind(" + connect_arguments, 5).substr(1).lstrip("[").rstrip("]") + ")," + parts[2] + "," + parts[3] + "," + parts[4] + ")" + line.substr(end + start);
			
		
	
	// -- "(tween_callback(A,B,[C,D]) != OK):", "(connect(Callable(A,B).bind(C,D))      Object
	tains("tween_callback(")) {
		int start = line.find("tween_callback(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 2) {
				line = line.substr(0, start) + "tween_callback(Callable(" + parts[0] + "," + parts[1] + "))" + line.substr(end + start);
			 else .size() >= 3) {
				line = line.substr(0, start) + "tween_callback(Callable(" + parts[0] + "," + parts[1] + ").bind(" + connect_arguments, 2).substr(1).lstrip("[").rstrip("]") + "))" + line.substr(end + start);
			
		
	
	// -- start(a,b) -> start(Callable(a,b))      Thread
	// -- start(a,b,c,d) -> start(Callable(a,b).bind(c),d)      Thread
	tains("start(")) {
		int start = line.find("start(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		// Protection from 'func start'
		if (!line.begins_with("func ")) {
			if (end > -1) {
				Vector<String> parts = parse_arguments(line.substr(start, end));
				.size() == 2) {
					line = line.substr(0, start) + "start(Callable(" + parts[0] + "," + parts[1] + "))" + line.substr(end + start);
				 else .size() >= 3) {
					line = line.substr(0, start) + "start(Callable(" + parts[0] + "," + parts[1] + ").bind(" + parts[2] + ")" + connect_arguments, 3) + ")" + line.substr(end + start);