### 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
{ "aqua", "AQUA" ,
	{ "aquamarine", "AQUAMARINE" ,
	{ "azure", "AZURE" ,
	{ "beige", "BEIGE" ,
	{ "bisque", "BISQUE" ,
	{ "black", "BLACK" ,
	{ "blanchedalmond", "BLANCHED_ALMOND" ,
	{ "blue", "BLUE" ,
	{ "blueviolet", "BLUE_VIOLET" ,
	{ "brown", "BROWN" ,
	{ "burlywood", "BURLYWOOD" ,
	{ "cadetblue", "CADET_BLUE" ,
	{ "chartreuse", "CHARTREUSE" ,
	{ "chocolate", "CHOCOLATE" ,
	{ "coral", "CORAL" ,
	{ "cornfwerblue", "CORNFLOWER_BLUE" ,
	{ "cornsilk", "CORNSILK" ,
	{ "crimson", "CRIMSON" ,
	{ "cyan", "CYAN" ,
	{ "darkblue", "DARK_BLUE" ,
	{ "darkcyan", "DARK_CYAN" ,
	{ "darkgoldenrod", "DARK_GOLDENROD" ,
	{ "darkgray", "DARK_GRAY" ,
	{ "darkgreen", "DARK_GREEN" ,
	{ "darkkhaki", "DARK_KHAKI" ,
	{ "darkmagenta", "DARK_MAGENTA" ,
	{ "darkolivegreen", "DARK_OLIVE_GREEN" ,
	{ "darkorange", "DARK_ORANGE" ,
	{ "darkorchid", "DARK_ORCHID" ,
	{ "darkred", "DARK_RED" ,