### 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) + "await " + parts[0] + "." + parts[1].replace("\\\"", "").replace("\\'", "").replace(" ", "") + line.substr(end + start);
				 
					line = line.substr(0, start) + "await " + parts[0] + "." + parts[1].replace("\"", "").replace("\'", "").replace(" ", "") + line.substr(end + start);
				
			
		
	
	// -- parse_json( AA ) -> TODO       Object
	tains("parse_json(")) {
		int start = line.find("parse_json(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			line = line.substr(0, start) + "JSON.new().stringify(" + connect_arguments, 0) + ")" + line.substr(end + start);
		
	
	// -- .xform(Vector3(a,b,c)) -> * Vector3(a,b,c)            Transform
	tains(".xform(")) {
		int start = line.find(".xform(");
		int end = get_end_parenthesis(line.substr(start)) + 1;
		if (end > -1) {
			Vector<String> parts = parse_arguments(line.substr(start, end));
			.size() == 1) {
				line = line.substr(0, start) + " * " + parts[0] + line.substr(end + start);
			
		
	
	// -- .xform_inv(Vector3(a,b,c)) -> * Vector3(a,b,c)       Transform
	tains(".xform_inv(")) {
		int start = line.find(".xform_inv(");