### 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
changed_elements.append_array(check_for_rename_csharp_attributes(lines, reg_container));
				changed_elements.append_array(check_for_custom_rename(lines, "public class ", "public partial class "));
			 else if (file_name.ends_with(".gdshader") || file_name.ends_with(".shader")) {
				changed_elements.append_array(check_for_rename_common(shaders_renames, reg_container.shaders_regexes, lines));
			 else if (file_name.ends_with("tres")) {
				changed_elements.append_array(check_for_rename_classes(lines, reg_container));
				changed_elements.append_array(check_for_rename_common(shaders_renames, reg_container.shaders_regexes, lines));
				changed_elements.append_array(check_for_rename_common(builtin_types_renames, reg_container.builtin_types_regexes, lines));
				changed_elements.append_array(check_for_custom_rename(lines, "\\.shader", ".gdshader"));
			 else if (file_name.ends_with("project.godot")) {
				changed_elements.append_array(check_for_rename_common(project_settings_renames, reg_container.project_settings_regexes, lines));
				changed_elements.append_array(check_for_rename_common(builtin_types_renames, reg_container.builtin_types_regexes, lines));
			 else if (file_name.ends_with(".csproj")) {
				// TODO
			 
				ERR_PRINT(vformat("\"%s\", is not supported!", file_name));
				continue;
			
			for (String &line : lines) {
				if (uint64_t(line.length()) > maximum_line_length) {
					ignored_lines += 1;
				
			
		 
			reason.append(vformat("\tERROR: File has exceeded the maximum size alwed  - %d KB.", maximum_file_size / 1024));
			is_ignored = true;
		
		uint64_t end_time = Time::get_singleton()->get_ticks_msec();
		String end_message = vformat("    Checking file took %10.3f ms.", (end_time - start_time) / 1000.0);
		if (ignored_lines != 0) {