### 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
valid = valid && test_conversion_gdscript_builtin("export(String, 'AnonymousPro', 'CourierPrime') var _font_name = 'AnonymousPro'", "export var _font_name = 'AnonymousPro' # (String, 'AnonymousPro', 'CourierPrime')", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false); // TODO, this is only a workaround
	valid = valid && test_conversion_gdscript_builtin("export(PackedScene) var mob_scene", "export var mob_scene: PackedScene", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("var d = parse_json(roman(sfs))", "var test_json_conv = JSON.new()\ntest_json_conv.parse(roman(sfs))\nvar d = test_json_conv.get_data()", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("to_json( AA ) szon", "JSON.new().stringify( AA ) szon", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("s to_json", "s JSON.new().stringify", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("AF to_json2", "AF to_json2", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("var rr = JSON.parse(a)", "var test_json_conv = JSON.new()\ntest_json_conv.parse(a)\nvar rr = test_json_conv.get_data()", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("empty()", "is_empty()", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin(".empty", ".empty", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin(").roman(", ").roman(", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("\t.roman(", "\tsuper.roman(", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin(" .roman(", " super.roman(", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin(".1", ".1", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin(" .1", " .1", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("'.'", "'.'", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("'.a'", "'.a'", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("\t._input(_event)", "\tsuper._input(_event)", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(connect(A,B,C) != OK):", "(connect(A,Callable(B,C)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(connect(A,B,C,D) != OK):", "(connect(A,Callable(B,C).bind(D)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(connect(A,B,C,[D]) != OK):", "(connect(A,Callable(B,C).bind(D)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(connect(A,B,C,[D,E]) != OK):", "(connect(A,Callable(B,C).bind(D,E)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(connect(A,B,C,[D,E],F) != OK):", "(connect(A,Callable(B,C).bind(D,E),F) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(connect(A,B,C,D,E) != OK):", "(connect(A,Callable(B,C).bind(D),E) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(start(A,B) != OK):", "(start(Callable(A,B)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("func start(A,B):", "func start(A,B):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(start(A,B,C,D,E,F,G) != OK):", "(start(Callable(A,B).bind(C),D,E,F,G) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("disconnect(A,B,C) != OK):", "disconnect(A,Callable(B,C)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("is_connected(A,B,C) != OK):", "is_connected(A,Callable(B,C)) != OK):", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("is_connected(A,B,C))", "is_connected(A,Callable(B,C)))", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);
	valid = valid && test_conversion_gdscript_builtin("(tween_method(A,B,C,D,E).foo())", "(tween_method(Callable(A,B),C,D,E).foo())", &rter3To4::rename_gdscript_functions, "custom rename", reg_container, false);