Export of GDExtension files that were excluded in EditorExportPlugin using skip still appear in extension_list.cfg resulting in errors during startup

[markeel]

Tested versions

• Reproducible in v4.4.dev [0c45ace]
• This is directly related to the problem identified in issue Export of GDExtension files that were excluded still appears in extension_list.cfg resulting in errors during startup #97207, but that fix didn't cover custom EditorExportPlugin's

System information

Godot v4.4.dev (0c45ace) - Ubuntu 24.04.1 LTS 24.04 on Wayland - X11 display driver, Single-window, 1 monitor - Vulkan (Forward+) - integrated Intel(R) UHD Graphics 770 (ADL-S GT1) - 12th Gen Intel(R) Core(TM) i7-12700K (20 threads)

Issue description

For people who have created a EditorExportPlugin and used it to remove directories using the "skip" method in their _export_file method the extension_list.cfg still has the skipped extension files.

The solution in #97207 needs to be enhanced to address this use case by capturing the skipped files and if they apply to a GDExtension removing them.

Steps to reproduce

1. Load the Git plugin from Asset Lib
2. Create a project that implements an editor export plugin that is used to skip the GIT plugin extension files.
3. Export the project and observe the error: "ERROR: Error loading GDExtension configuration file: res://addons/godot-git-plugin/git_plugin.gdextension"

Minimal reproduction project (MRP)

skipper.gd

@tool
extends EditorExportPlugin

func _export_file(path: String, type: String, features: PackedStringArray) -> void:
	if "godot-git-plugin" in path:
		skip()

export.gd

@tool
extends EditorPlugin

var export_plugin = preload("skipper.gd").new()

func _enter_tree() -> void:
	add_export_plugin(export_plugin)

func _exit_tree() -> void:
	remove_export_plugin(export_plugin)

func _get_name():
	return "skipper"

plugin.cfg

[plugin]

name="export"
description=""
author=""
version=""
script="export.gd"