### 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
variable_start--;
			
			start--;
			continue;
		 
			// Abandon all hope, this is neither a variable nor a Node path literal.
			variable_start++; // Found invalid character, needs to be ignored.
			break;
		
	
	if (is_valid_nodepath) {
		variable_start = start;
	
	return line.substr(variable_start, (end - variable_start));
void rter3To4::rename_cors(Vector<String> &lines, const RegExContainer &reg_container) {
	for (String &line : lines) {
		if (uint64_t(line.length()) <= maximum_line_length) {
			tains("Cor.")) {
				igned int current_index = 0; cor_renames[current_index][0]; current_index++) {
					line = reg_container.cor_regexes[current_index]->sub(line, reg_container.cor_renamed[current_index], true);
				
			
		
	
;
Vector<String> rter3To4::check_for_rename_cors(Vector<String> &lines, const RegExContainer &reg_container) {
	Vector<String> found_renames;
	int current_line = 1;
	for (String &line : lines) {
		if (uint64_t(line.length()) <= maximum_line_length) {