### 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
```gdscript
extends Node2D

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

Result
```gdscript
extends Node2D

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

Expected result
```gdscript
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](https://github.com/godotengine/godot/files/11185334/Conversion.Tool.Typing.Problem.zip)

LocalVector<RegEx *> gdscript_function_regexes;
	LocalVector<RegEx *> project_settings_regexes;
	LocalVector<RegEx *> project_godot_regexes;
	LocalVector<RegEx *> input_map_regexes;
	LocalVector<RegEx *> gdscript_properties_regexes;
	LocalVector<RegEx *> gdscript_signals_regexes;
	LocalVector<RegEx *> shaders_regexes;
	LocalVector<RegEx *> builtin_types_regexes;
	LocalVector<RegEx *> theme_override_regexes;
	LocalVector<RegEx *> csharp_function_regexes;
	LocalVector<RegEx *> csharp_properties_regexes;
	LocalVector<RegEx *> csharp_signal_regexes;
	RegExContainer() {
		
		{
			
			for (unsigned int current_index = 0; RenamesMap3To4::enum_renames[current_index][0]; current_index++) {
				enum_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::enum_renames[current_index][0] + "\\b")));
			}
			
			for (unsigned int current_index = 0; RenamesMap3To4::gdscript_function_renames[current_index][0]; current_index++) {
				gdscript_function_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::gdscript_function_renames[current_index][0] + "\\b")));
			}
			
			for (unsigned int current_index = 0; RenamesMap3To4::project_settings_renames[current_index][0]; current_index++) {
				project_settings_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::project_settings_renames[current_index][0] + "\\b")));
			}
			
			for (unsigned int current_index = 0; RenamesMap3To4::project_godot_renames[current_index][0]; current_index++) {
				project_godot_regexes.push_back(memnew(RegEx(String("\\b") + RenamesMap3To4::project_godot_renames[current_index][0] + "\\b")));