### 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
for (String &line : lines) {
		if (uint64_t(line.length()) <= maximum_line_length) {
			igned int current_index = 0; current_index < cached_regexes.size(); current_index++) {
				tains(array[current_index][0])) {
					TypedArray<RegExMatch> reg_match = cached_regexes[current_index]->search_all(line);
					if (reg_match.size() > 0) {
						found_renames.append(line_formatter(current_line, array[current_index][0], array[current_index][1], line));
					
				
			
		
		current_line++;
	
	return found_renames;
// Prints full info about renamed things e.g.:
// Line (67) remove -> remove_at  -  LINE """ doubler._blacklist.remove(0) """
String rter3To4::line_formatter(int current_line, String from, String to, String line) {
	if (from.size() > 200) {
		from = from.substr(0, 197) + "...";
	
	if (to.size() > 200) {
		to = to.substr(0, 197) + "...";
	
	if (line.size() > 400) {
		line = line.substr(0, 397) + "...";
	
	from = from.strip_escapes();
	to = to.strip_escapes();
	line = line.replace("\r", "").replace("\n", "").strip_edges();
	return vformat("Line(%d), %s -> %s  -  LINE \"\"\" %s \"\"\"", current_line, from, to, line);