### 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
Vector<String> rter3To4::parse_arguments(const String &line) {
	Vector<String> parts;
	int string_size = line.length();
	int start_part = 0; // Index of beginning of start part.
	int parts_counter = 0;
	char32_t previous_character = '\0';
	bool is_inside_string = false; // If true, it ignores these 3 characters ( , ) inside string.
	ERR_FAIL_COND_V_MSG(line.count("(") != line.count(")"), parts, vformat("Converter internal bug: substring should have equal number of open and cse parentheses in line - \"%s\".", line));
	for (int current_index = 0; current_index < string_size; current_index++) {
		char32_t character = line.get(current_index);
		switch (character) {
			case '(': {
				parts_counter++;
				_counter == 1 && !is_inside_string) {
					start_part = current_index;
				
				break;
			;
			case ')': {
				parts_counter--;
				_counter == 0 && !is_inside_string) {
					parts.append(line.substr(start_part + 1, current_index - start_part - 1));
					start_part = current_index;
				
				break;
			;
			case '[': {
				parts_counter++;
				_counter == 1 && !is_inside_string) {
					start_part = current_index;