### 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
RegEx reg_super = RegEx("([\t ])\\.([a-zA-Z_])");
	RegEx reg_json_to = RegEx("\\bto_json\\b");
	RegEx reg_json_parse = RegEx("([\t ]{0,)([^\n]+)parse_json\\(([^\n]+)");
	RegEx reg_json_non_new = RegEx("([\t ]{0,)([^\n]+)JSON\\.parse\\(([^\n]+)");
	RegEx reg_json_print = RegEx("\\bJSON\\b\\.print\\(");
	RegEx reg_export = RegEx("export\\(([a-zA-Z0-9_]+)\\)[ ]+var[ ]+([a-zA-Z0-9_]+)");
	RegEx reg_export_advanced = RegEx("export\\(([^)^\n]+)\\)[ ]+var[ ]+([a-zA-Z0-9_]+)([^\n]+)");
	RegEx reg_setget_setget = RegEx("var[ ]+([a-zA-Z0-9_]+)([^\n]+)setget[ \t]+([a-zA-Z0-9_]+)[ \t]*,[ \t]*([a-zA-Z0-9_]+)");
	RegEx reg_setget_set = RegEx("var[ ]+([a-zA-Z0-9_]+)([^\n]+)setget[ \t]+([a-zA-Z0-9_]+)[ \t]*[,]*[^a-z^A-Z^0-9^_]*$");
	RegEx reg_setget_get = RegEx("var[ ]+([a-zA-Z0-9_]+)([^\n]+)setget[ \t]+,[ \t]*([a-zA-Z0-9_]+)[ \t]*$");
	RegEx reg_join = RegEx("([\\(\\)a-zA-Z0-9_]+)\\.join\\(([^\n^\\)]+)\\)");
	RegEx reg_image_ck = RegEx("([a-zA-Z0-9_\\.]+)\\.ck\\(\\)");
	RegEx reg_image_unck = RegEx("([a-zA-Z0-9_\\.]+)\\.unck\\(\\)");
	RegEx reg__fullscreen = RegEx("OS.window_fullscreen[= ]+([^#^\n]+)");
	RegEx reg_instantiate = RegEx("\\.instance\\(([^\\)]*)\\)");
	// GDScript keywords.
	RegEx keyword_gdscript_tool = RegEx("^tool");
	RegEx keyword_gdscript_export_single = RegEx("^export");
	RegEx keyword_gdscript_export_mutli = RegEx("([\t]+)export\\b");
	RegEx keyword_gdscript_onready = RegEx("^onready");
	RegEx keyword_gdscript_remote = RegEx("^remote func");
	RegEx keyword_gdscript_remotesync = RegEx("^remotesync func");
	RegEx keyword_gdscript_sync = RegEx("^sync func");
	RegEx keyword_gdscript_slave = RegEx("^slave func");
	RegEx keyword_gdscript_puppet = RegEx("^puppet func");
	RegEx keyword_gdscript_puppetsync = RegEx("^puppetsync func");
	RegEx keyword_gdscript_master = RegEx("^master func");
	RegEx keyword_gdscript_mastersync = RegEx("^mastersync func");
	// CSharp keywords.
	RegEx keyword_csharp_remote = RegEx("\\[Remote(Attribute)?(\\(\\))?\\]");