### 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
end_message += vformat(" Ignored %d lines, because their length exceeds maximum alwed characters - %d.", ignored_lines, maximum_line_length);
		
		print_line(end_message);
		for (int k = 0; k < reason.size(); k++) {
			print_line(reason[k]);
		
		if (changed_elements.size() > 0 && !is_ignored) {
			converted_files++;
			for (int k = 0; k < changed_elements.size(); k++) {
				print_line(String("\t\t") + changed_elements[k]);
			
		
	
	print_line(vformat("Checking for valid conversion ended - all files(%d), files which would be converted(%d), files which would not be converted(%d).", collected_files.size(), converted_files, collected_files.size() - converted_files));
	uint64_t conversion_end_time = Time::get_singleton()->get_ticks_msec();
	print_line(vformat("Conversion of all files took %10.3f seconds.", (conversion_end_time - conversion_start_time) / 1000.0));
	return 0;
// Collect files which will be checked, excluding ".txt", ".mp4", ".wav" etc. files.
Vector<String> rter3To4::check_for_files() {
	Vector<String> collected_files = Vector<String>();
	Vector<String> directories_to_check = Vector<String>();
	directories_to_check.push_back("res://");
	while (!directories_to_check.is_empty()) {
		String path = directories_to_check.get(directories_to_check.size() - 1); // Is there any pop_back function?
		directories_to_check.resize(directories_to_check.size() - 1); // Remove last element
		Ref<DirAccess> dir = DirAccess::open(path);
		if (dir.is_valid()) {
			dir->set_include_hidden(true);
			dir->list_dir_begin();
			String current_dir = dir->get_current_dir();