### 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
int start = line.find("disconnect(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 3) {
				line = line.substr(0, start) + "disconnect(" + parts[0] + ",Callable(" + parts[1] + "," + parts[2] + "))" + line.substr(end + start);
			
		
	
	// -- is_connected(a,b,c) -> is_connected(a,Callable(b,c))      Object
	tains("is_connected(")) {
		int start = line.find("is_connected(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 3) {
				line = line.substr(0, start) + "is_connected(" + parts[0] + ",Callable(" + parts[1] + "," + parts[2] + "))" + line.substr(end + start);
			
		
	
	// -- "(tween_method(A,B,C,D,E) != OK):", "(tween_method(Callable(A,B),C,D,E)      Object
	// -- "(tween_method(A,B,C,D,E,[F,G]) != OK):", "(tween_method(Callable(A,B).bind(F,G),C,D,E)      Object
	tains("tween_method(")) {
		int start = line.find("tween_method(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 5) {
				line = line.substr(0, start) + "tween_method(Callable(" + parts[0] + "," + parts[1] + ")," + parts[2] + "," + parts[3] + "," + parts[4] + ")" + line.substr(end + start);
			 else .size() >= 6) {