### 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)

switch (p_option) {
		case EDIT_UNDO: {
			shader_editor->get_text_editor()->undo();
		} break;
		case EDIT_REDO: {
			shader_editor->get_text_editor()->redo();
		} break;
		case EDIT_CUT: {
			shader_editor->get_text_editor()->cut();
		} break;
		case EDIT_COPY: {
			shader_editor->get_text_editor()->copy();
		} break;
		case EDIT_PASTE: {
			shader_editor->get_text_editor()->paste();
		} break;
		case EDIT_SELECT_ALL: {
			shader_editor->get_text_editor()->select_all();
		} break;
		case EDIT_MOVE_LINE_UP: {
			shader_editor->move_lines_up();
		} break;
		case EDIT_MOVE_LINE_DOWN: {
			shader_editor->move_lines_down();
		} break;
		case EDIT_INDENT: {
			if (shader.is_null()) {
				return;