### 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
String name = "AA.instance()";
		Vector<String> got = String("AA.instance()").split("\n");
		String expected = "AA.instantiate()";
		custom_rename(got, from, to);
		String got_str = collect_string_from_vector(got);
		if (got_str != expected) {
			ERR_PRINT(vformat("Failed to convert custom rename \"%s\" to \"%s\", got \"%s\", instead.", name, expected, got_str));
		
		valid = valid && (got_str == expected);
	
	// get_object_of_execution
	{
		{ String base = "var roman = kieliszek.";
	String expected = "kieliszek.";
	String got = get_object_of_execution(base);
	if (got != expected) {
		ERR_PRINT(vformat("Failed to get proper data from get_object_of_execution. \"%s\" should return \"%s\"(%d), got \"%s\"(%d), instead.", base, expected, expected.size(), got, got.size()));
	
	valid = valid && (got == expected);
{
	String base = "r.";
	String expected = "r.";
	String got = get_object_of_execution(base);
	if (got != expected) {
		ERR_PRINT(vformat("Failed to get proper data from get_object_of_execution. \"%s\" should return \"%s\"(%d), got \"%s\"(%d), instead.", base, expected, expected.size(), got, got.size()));
	
	valid = valid && (got == expected);
{
	String base = "mortadela(";
	String expected = "";