### Godot version

4.0.3

### System information

Win7

### Issue description

#if and #else highlighted with the color same as if and else shader statement:

![image](https://github.com/godotengine/godot/assets/28286958/c2d58151-d6d2-4305-b4da-36e76e316caf)


### Steps to reproduce

1. Create shader
2. Add #if and #else

### Minimal reproduction project

N/A
TextEdit::LineWrappingMode wrap = shader_editor->get_text_editor()->get_line_wrapping_mode();
			shader_editor->get_text_editor()->set_line_wrapping_mode(wrap == TextEdit::LINE_WRAPPING_BOUNDARY ? TextEdit::LINE_WRAPPING_NONE : TextEdit::LINE_WRAPPING_BOUNDARY);
		} break;
		case EDIT_TOGGLE_COMMENT: {
			if (shader.is_null()) {
				return;
			}
			shader_editor->toggle_inline_comment("//");
		} break;
		case EDIT_COMPLETE: {
			shader_editor->get_text_editor()->request_code_completion();
		} break;
		case SEARCH_FIND: {
			shader_editor->get_find_replace_bar()->popup_search();
		} break;
		case SEARCH_FIND_NEXT: {
			shader_editor->get_find_replace_bar()->search_next();
		} break;
		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;