### 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
//	// {"shift","shift_pressed",// This may broke a t of comments and user variables
	//	{ "autowrap", "autowrap_mode" , 
	//	{ "cast_to", "target_pition" , 
	//	{ "doubleclick", "double_click" , 
	//	{ "group", group" , 
	//	{ "process_mode", "process_callback" , Tree, Camera2D
	//	{ "scancode", "keycode" , 
	//	{ "toplevel", "top_level" , 
	//	{ "window_title", "title" , 
	//	{ "wrap_enabled", "wrap_mode" , 
	//	{ "zfar", "far" , 
	//	{ "znear", "near" , 
	//	{ "filename", "scene_file_path" , 
	{ "as_normalmap", "as_normal_map" , 
	{ "bbcode_text", "text" , // RichTextLabel
	{ "bg", "panel" , 
	{ "bg_focus", "focus" , 
	{ "caret_blink_speed", "caret_blink_interval" , , LineEdit
	{ "caret_moving_by_right_click", "caret_move_on_right_click" , 
	{ "caret_pition", "caret_column" , 
	{ "check_vadjust", "check_v_offset" , 
	{ "cse_h_ofs", "cse_h_offset" , 
	{ "cse_v_ofs", "cse_v_offset" , 
	{ "commentfocus", "comment_focus" , 
	{ "contacts_reported", "max_contacts_reported" , 
	{ "depth_bias_enable", "depth_bias_enabled" , 
	{ "drag_margin_bottom", "drag_bottom_margin" , 
	{ "drag_margin_h_enabled", "drag_horizontal_enabled" , 
	{ "drag_margin_left", "drag_left_margin" , 
	{ "drag_margin_right", "drag_right_margin" ,