### 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
if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 2) {
				line = line.substr(0, start) + "create_from_image(" + parts[0] + ") " + "#," + parts[1] + line.substr(end + start);
			
		
	
	//  set_cell_item(a, b, c, d ,e)  ->   set_cell_item(Vector3(a, b, c), d ,e)
	tains("set_cell_item(")) {
		int start = line.find("set_cell_item(");
		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) + "set_cell_item( Vector3(" + parts[0] + "," + parts[1] + "," + parts[2] + ") " + connect_arguments, 3) + ")" + line.substr(end + start);
			
		
	
	//  get_cell_item(a, b, c)  ->   get_cell_item(Vector3i(a, b, c))
	tains("get_cell_item(")) {
		int start = line.find("get_cell_item(");
		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) + "get_cell_item(Vector3i(" + parts[0] + "," + parts[1] + "," + parts[2] + "))" + line.substr(end + start);
			
		
	
	//  get_cell_item_orientation(a, b, c)  ->   get_cell_item_orientation(Vector3i(a, b, c))