### 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
memdelete(shaders_regexes[i]);
		
		igned int i = 0; i < builtin_types_regexes.size(); i++) {
			memdelete(builtin_types_regexes[i]);
		
		igned int i = 0; i < csharp_function_regexes.size(); i++) {
			memdelete(csharp_function_regexes[i]);
		
		igned int i = 0; i < csharp_properties_regexes.size(); i++) {
			memdelete(csharp_properties_regexes[i]);
		
		igned int i = 0; i < csharp_signal_regexes.size(); i++) {
			memdelete(csharp_signal_regexes[i]);
		
	
;
rter3To4::rter3To4(int p_maximum_file_size_kb, int p_maximum_line_length) {
	maximum_file_size = p_maximum_file_size_kb * 1024;
	maximum_line_length = p_maximum_line_length;
// Function responsible for converting project.
int rter3To4::convert() {
	print_line("Starting conversion.");
	uint64_t conversion_start_time = Time::get_singleton()->get_ticks_msec();
	RegExContainer reg_container = RegExContainer();
	int cached_maximum_line_length = maximum_line_length;
	maximum_line_length = 10000; // Use only for tests bigger value, to not break them.
	ERR_FAIL_COND_V_MSG(!test_array_names(), ERROR_CODE, "Cannot start converting due to problems with data in arrays.");
	ERR_FAIL_COND_V_MSG(!test_conversion(reg_container), ERROR_CODE, "Cannot start converting due to problems with converting arrays.");
	maximum_line_length = cached_maximum_line_length;
	// Checking if folder contains valid Godot 3 project.