Conversion tool: exported variable types are incorrect

[Louis-Simon22]

Godot version

4.0.2.stable

System information

Ubuntu 22.10

Issue description

This happens when converting a godot3 project to a godot4 project.
Godot3 source

extends Node2D

export(int) var integer := 2
export(Resource) var resource: Resource = null

Result

extends Node2D

@export var integer: int := 2
@export var resource: Resource: Resource = null

Expected result

extends Node2D

@export var integer := 2
@export var resource: Resource = null

If someone can point to where in the code this might be fixed maybe I can fix it myself, sounds like a good first issue.

Steps to reproduce

Open the given project (or any project really) and convert it to a godot 4 project

Minimal reproduction project

Conversion Tool Typing Problem.zip