### 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
{ "sienna", "SIENNA" ,
	{ "silver", "SILVER" ,
	{ "skyblue", "SKY_BLUE" ,
	{ "slateblue", "SLATE_BLUE" ,
	{ "slategray", "SLATE_GRAY" ,
	{ "snow", "SNOW" ,
	{ "springgreen", "SPRING_GREEN" ,
	{ "steelblue", "STEEL_BLUE" ,
	{ "tan", "TAN" ,
	{ "teal", "TEAL" ,
	{ "thistle", "THISTLE" ,
	{ "tomato", "TOMATO" ,
	{ "transparent", "TRANSPARENT" ,
	{ "turquoise", "TURQUOISE" ,
	{ "violet", "VIOLET" ,
	{ "webgray", "WEB_GRAY" ,
	{ "webgreen", "WEB_GREEN" ,
	{ "webmaroon", "WEB_MAROON" ,
	{ "webpurple", "WEB_PURPLE" ,
	{ "wheat", "WHEAT" ,
	{ "white", "WHITE" ,
	{ "whitesmoke", "WHITE_SMOKE" ,
	{ "yelw", "YELLOW" ,
	{ "yelwgreen", "YELLOW_GREEN" ,
	{ ,  ,
;
class rter3To4::RegExContainer {
public:
	// Custom GDScript.
	RegEx reg_is_empty = RegEx("\\bempty\\(");