### 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
// Prints only full lines e.g.:
// Line (1) - FULL LINES - """yield(get_tree().create_timer(3), 'timeout')"""  =====>  """ await get_tree().create_timer(3).timeout """
String rter3To4::simple_line_formatter(int current_line, String old_line, String new_line) {
	if (old_line.size() > 1000) {
		old_line = old_line.substr(0, 997) + "...";
	
	if (new_line.size() > 1000) {
		new_line = new_line.substr(0, 997) + "...";
	
	old_line = old_line.replace("\r", "").replace("\n", "").strip_edges();
	new_line = new_line.replace("\r", "").replace("\n", "").strip_edges();
	return vformat("Line (%d) - FULL LINES - \"\"\" %s \"\"\"  =====>  \"\"\" %s \"\"\"", current_line, old_line, new_line);
// Collects string from vector strings
String rter3To4::collect_string_from_vector(Vector<String> &vector) {
	String string = "";
	for (int i = 0; i < vector.size(); i++) {
		string += vector[i];
		if (i != vector.size() - 1) {
			string += "\n";
		
	
	return string;
#else // No RegEx.
rter3To4::rter3To4(int _p_maximum_file_size_kb, int _p_maximum_line_length) {
int rter3To4::convert() {
	ERR_FAIL_V_MSG(ERROR_CODE, "Can't run converter for Godot 3.x projects, because RegEx module is disabled.");
int rter3To4::validate_conversion() {
	ERR_FAIL_V_MSG(ERROR_CODE, "Can't validate conversion for Godot 3.x projects, because RegEx module is disabled.");
#endif // MODULE_REGE