### 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
.size() == 5) {
				line = line.substr(0, start) + "draw_line(" + parts[0] + "," + parts[1] + "," + parts[2] + "," + parts[3] + ")" + line.substr(end + start);
			
		
	
	// -- func c(var a, var b) -> func c(a, b)
	tains("func ") && line.contains("var ")) {
		int start = line.find("func ");
		start = line.substr(start).find("(") + start;
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			String start_string = line.substr(0, start) + "(";
			for (int i = 0; i < parts.size(); i++) {
				start_string += parts[i].strip_edges().trim_prefix("var ");
				if (i != parts.size() - 1) {
					start_string += ", ";
				
			
			line = start_string + ")" + line.substr(end + start);
		
	
	// -- yield(this, \"timeout\") -> await this.timeout         GDScript
	tains("yield(")) {
		int start = line.find("yield(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 2) {
				if (builtin) {