### Godot version

v4.0.beta15.official [4fa6edc88]

### System information

Windows 10 (10.0.19045 Build 19045) | Forward+ | Vulkan API 1.3.206 | AMD Radeon RX 6800 XT

### Issue description

If there is a function with arguments within a `.gdshaderinc` file, then this function can not be used in other shaders that include this via a relative include. The error in the other shaders is "Too many arguments for "example()" call. Expected at most 0 but received 1". Using an absolute path for the include resolves the error.

**Note:** The relative include *does* work in the special case of both files being in the project root.

### Steps to reproduce

1. Put a shader and a shader-include file into a subdirectory
2. Write a function with arguments in the shader-include file
3. Include that file in the shader
4. Try to use the function

### Minimal reproduction project

[shader-include-bug.zip](https://github.com/godotengine/godot/files/10508745/shader-include-bug.zip)

case SEARCH_FIND_PREV: {
			shader_editor->get_find_replace_bar()->search_prev();
		} break;
		case SEARCH_REPLACE: {
			shader_editor->get_find_replace_bar()->popup_replace();
		} break;
		case SEARCH_GOTO_LINE: {
			goto_line_dialog->popup_find_line(shader_editor->get_text_editor());
		} break;
		case BOOKMARK_TOGGLE: {
			shader_editor->toggle_bookmark();
		} break;
		case BOOKMARK_GOTO_NEXT: {
			shader_editor->goto_next_bookmark();
		} break;
		case BOOKMARK_GOTO_PREV: {
			shader_editor->goto_prev_bookmark();
		} break;
		case BOOKMARK_REMOVE_ALL: {
			shader_editor->remove_all_bookmarks();
		} break;
		case HELP_DOCS: {
			OS::get_singleton()->shell_open(vformat("%s/tutorials/shaders/shader_reference/index.html", VERSION_DOCS_URL));
		} break;
	}
	if (p_option != SEARCH_FIND && p_option != SEARCH_REPLACE && p_option != SEARCH_GOTO_LINE) {
		shader_editor->get_text_editor()->call_deferred(SNAME("grab_focus"));
	}
}
void TextShaderEditor::_notification(int p_what) {