### 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
{ "_set_current", "set_current" , 
	{ "_set_editor_description", "set_editor_description" , 
	{ "_set_playing", "set_playing" , 
	{ "_toplevel_raise_self", "_top_level_raise_self" , 
	{ "_update_wrap_at", "_update_wrap_at_column" , 
	{ "add_animation", "add_animation_library" , 
	{ "add_cancel", "add_cancel_button" , 
	{ "add_central_force", "apply_central_force" , 
	{ "add_child_bew_node", "add_sibling" , 
	{ "add_cor_override", "add_theme_cor_override" , 
	{ "add_constant_override", "add_theme_constant_override" , 
	{ "add_font_override", "add_theme_font_override" , 
	{ "add_force", "apply_force" , 
	{ "add_icon_override", "add_theme_icon_override" , 
	{ "add_scene_import_plugin", "add_scene_format_importer_plugin" , 
	{ "add_spatial_gizmo_plugin", "add_node_3d_gizmo_plugin" , 
	{ "add_stylebox_override", "add_theme_stylebox_override" , 
	{ "add_torque", "apply_torque" , 
	{ "agent_set_neighbor_dist", "agent_set_neighbor_distance" , 
	{ "apply_changes", "_apply_changes" , 
	{ "body_add_force", "body_apply_force" , 
	{ "body_add_torque", "body_apply_torque" , 
	{ "bumpmap_to_normalmap", "bump_map_to_normal_map" , 
	{ "can_be_hidden", "_can_be_hidden" , 
	{ "can_drop_data_fw", "_can_drop_data_fw" , 
	{ "can_generate_small_preview", "_can_generate_small_preview" , 
	{ "can_instance", "can_instantiate" , 
	{ "canvas_light_set_scale", "canvas_light_set_texture_scale" , 
	{ "center_viewport_to_cursor", "center_viewport_to_caret" , 
	{ "change_scene", "change_scene_to_file" ,