### 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
{ "lemonchiffon", "LEMON_CHIFFON" ,
	{ "lightblue", "LIGHT_BLUE" ,
	{ "lightcoral", "LIGHT_CORAL" ,
	{ "lightcyan", "LIGHT_CYAN" ,
	{ "lightgoldenrod", "LIGHT_GOLDENROD" ,
	{ "lightgray", "LIGHT_GRAY" ,
	{ "lightgreen", "LIGHT_GREEN" ,
	{ "lightpink", "LIGHT_PINK" ,
	{ "lightsalmon", "LIGHT_SALMON" ,
	{ "lightseagreen", "LIGHT_SEA_GREEN" ,
	{ "lightskyblue", "LIGHT_SKY_BLUE" ,
	{ "lightslategray", "LIGHT_SLATE_GRAY" ,
	{ "lightsteelblue", "LIGHT_STEEL_BLUE" ,
	{ "lightyelw", "LIGHT_YELLOW" ,
	{ "lime", "LIME" ,
	{ "limegreen", "LIME_GREEN" ,
	{ "linen", "LINEN" ,
	{ "magenta", "MAGENTA" ,
	{ "maroon", "MAROON" ,
	{ "mediumaquamarine", "MEDIUM_AQUAMARINE" ,
	{ "mediumblue", "MEDIUM_BLUE" ,
	{ "mediumorchid", "MEDIUM_ORCHID" ,
	{ "mediumpurple", "MEDIUM_PURPLE" ,
	{ "mediumseagreen", "MEDIUM_SEA_GREEN" ,
	{ "mediumslateblue", "MEDIUM_SLATE_BLUE" ,
	{ "mediumspringgreen", "MEDIUM_SPRING_GREEN" ,
	{ "mediumturquoise", "MEDIUM_TURQUOISE" ,
	{ "mediumvioletred", "MEDIUM_VIOLET_RED" ,
	{ "midnightblue", "MIDNIGHT_BLUE" ,
	{ "mintcream", "MINT_CREAM" ,