### 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
if (got != expected) {
		ERR_PRINT(vformat("Failed to get proper data from parse_arguments. \"%s\" should return \"%s\"(%d), got \"%s\"(%d), instead.", line, expected, expected.size(), got, got.size()));
	
	valid = valid && (got == expected);
{
	String line = "(a , b , c)";
	Vector<String> got_vector = parse_arguments(line);
	String got = "";
	String expected = "a|||b|||c|||";
	for (String &part : got_vector) {
		got += part + "|||";
	
	if (got != expected) {
		ERR_PRINT(vformat("Failed to get proper data from parse_arguments. \"%s\" should return \"%s\"(%d), got \"%s\"(%d), instead.", line, expected, expected.size(), got, got.size()));
	
	valid = valid && (got == expected);
{
	String line = "(a , \"b,\" , c)";
	Vector<String> got_vector = parse_arguments(line);
	String got = "";
	String expected = "a|||\"b,\"|||c|||";
	for (String &part : got_vector) {
		got += part + "|||";
	
	if (got != expected) {
		ERR_PRINT(vformat("Failed to get proper data from parse_arguments. \"%s\" should return \"%s\"(%d), got \"%s\"(%d), instead.", line, expected, expected.size(), got, got.size()));
	
	valid = valid && (got == expected);
{