### 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 keyword_csharp_remotesync = RegEx("\\[(Remote)?Sync(Attribute)?(\\(\\))?\\]");
	RegEx keyword_csharp_puppet = RegEx("\\[(Puppet|Slave)(Attribute)?(\\(\\))?\\]");
	RegEx keyword_csharp_puppetsync = RegEx("\\[PuppetSync(Attribute)?(\\(\\))?\\]");
	RegEx keyword_csharp_master = RegEx("\\[Master(Attribute)?(\\(\\))?\\]");
	RegEx keyword_csharp_mastersync = RegEx("\\[MasterSync(Attribute)?(\\(\\))?\\]");
	s.
	r<RegEx *> cor_regexes;
	r<String> cor_renamed;
	// Classes.
	r<RegEx *> class_tscn_regexes;
	r<RegEx *> class_gd_regexes;
	r<RegEx *> class_shader_regexes;
	r<RegEx *> class_regexes;
	RegEx class_temp_tscn = RegEx("\\bTEMP_RENAMED_CLASS.tscn\\b");
	RegEx class_temp_gd = RegEx("\\bTEMP_RENAMED_CLASS.gd\\b");
	RegEx class_temp_shader = RegEx("\\bTEMP_RENAMED_CLASS.shader\\b");
	r<String> class_temp_tscn_renames;
	r<String> class_temp_gd_renames;
	r<String> class_temp_shader_renames;
	// Common.
	r<RegEx *> enum_regexes;
	r<RegEx *> gdscript_function_regexes;
	r<RegEx *> project_settings_regexes;
	r<RegEx *> gdscript_properties_regexes;
	r<RegEx *> gdscript_signals_regexes;
	r<RegEx *> shaders_regexes;
	r<RegEx *> builtin_types_regexes;
	r<RegEx *> csharp_function_regexes;
	r<RegEx *> csharp_properties_regexes;
	r<RegEx *> csharp_signal_regexes;