### 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
{ "mistyre", "MISTY_ROSE" ,
	{ "moccasin", "MOCCASIN" ,
	{ "navajowhite", "NAVAJO_WHITE" ,
	{ "navyblue", "NAVY_BLUE" ,
	{ "oldlace", "OLD_LACE" ,
	{ "olive", "OLIVE" ,
	{ "olivedrab", "OLIVE_DRAB" ,
	{ "orange", "ORANGE" ,
	{ "orangered", "ORANGE_RED" ,
	{ "orchid", "ORCHID" ,
	{ "palegoldenrod", "PALE_GOLDENROD" ,
	{ "palegreen", "PALE_GREEN" ,
	{ "paleturquoise", "PALE_TURQUOISE" ,
	{ "palevioletred", "PALE_VIOLET_RED" ,
	{ "papayawhip", "PAPAYA_WHIP" ,
	{ "peachpuff", "PEACH_PUFF" ,
	{ "peru", "PERU" ,
	{ "pink", "PINK" ,
	{ "plum", "PLUM" ,
	{ "powderblue", "POWDER_BLUE" ,
	{ "purple", "PURPLE" ,
	{ "rebeccapurple", "REBECCA_PURPLE" ,
	{ "red", "RED" ,
	{ "rybrown", "ROSY_BROWN" ,
	{ "royalblue", "ROYAL_BLUE" ,
	{ "saddlebrown", "SADDLE_BROWN" ,
	{ "salmon", "SALMON" ,
	{ "sandybrown", "SANDY_BROWN" ,
	{ "seagreen", "SEA_GREEN" ,
	{ "seashell", "SEASHELL" ,