### 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
{ "_AboutToShow", "_AboutToPopup" , 
	{ "_GetConfigurationWarning", "_GetConfigurationWarnings" , 
	{ "_SetCurrent", "SetCurrent" , 
	{ "_SetEditorDescription", "SetEditorDescription" , 
	{ "_SetPlaying", "SetPlaying" , 
	{ "_ToplevelRaiseSelf", "_TopLevelRaiseSelf" , 
	{ "_UpdateWrapAt", "_UpdateWrapAtColumn" , 
	{ "AddAnimation", "AddAnimationLibrary" , 
	{ "AddCancel", "AddCancelButton" , 
	{ "AddCentralForce", "AddConstantCentralForce" , 
	{ "AddChildBewNode", "AddSibling" , 
	{ "AddCorOverride", "AddThemeCorOverride" , 
	{ "AddConstantOverride", "AddThemeConstantOverride" , 
	{ "AddFontOverride", "AddThemeFontOverride" , 
	{ "AddForce", "AddConstantForce" , 
	{ "AddIconOverride", "AddThemeIconOverride" , 
	{ "AddSceneImportPlugin", "AddSceneFormatImporterPlugin" , 
	{ "AddStyleboxOverride", "AddThemeStyleboxOverride" , 
	{ "AddTorque", "AddConstantTorque" , 
	{ "AgentSetNeighborDist", "AgentSetNeighborDistance" , 
	{ "BindChildNodeToBone", "SetBoneChildren" , 
	{ "BumpmapToNormalmap", "BumpMapToNormalMap" , 
	{ "CanBeHidden", "_CanBeHidden" , 
	{ "CanDropDataFw", "_CanDropDataFw" , 
	{ "CanGenerateSmallPreview", "_CanGenerateSmallPreview" , 
	{ "CanInstance", "CanInstantiate" , 
	{ "CanvasLightSetScale", "CanvasLightSetTextureScale" , 
	{ "CenterViewportToCursor", "CenterViewportToCaret" , 
	{ "ChangeScene", "ChangeSceneToFile" , 
	{ "ChangeSceneTo", "ChangeSceneToPacked" ,