### Godot version

v4.0.beta.custom_build [0abd60b95]

### System information

Windows 10, Vulkan

### Issue description

Autocomplete doesn't work when trying to access a scene node that isn't a direct child of the scene root script, using $NodePath (Shorthand for get_node("NodePath") as per docs).

Example:
![image](https://user-images.githubusercontent.com/115422160/212197922-10e73c9f-de10-475e-ac6e-4163fc5b8013.png)

It worked in Godot 3.5:
![3.5](https://user-images.githubusercontent.com/115422160/212197992-61b67a42-86c6-4650-bab4-c7dfa5a67975.PNG)

I should mention that it works if you start by typing the name of a direct child:
![image](https://user-images.githubusercontent.com/115422160/212198641-6d8e6fca-a2d2-47a7-b627-2df95268daf5.png)

But when you have many nodes in the scene and longer names it's a pain to access the last children like that.


### Steps to reproduce

See above or MRP.

### Minimal reproduction project

[autocomplete bug.zip](https://github.com/godotengine/godot/files/10406695/autocomplete.bug.zip)

code_completion_active = true;
		queue_redraw();
		return;
	}
	const int caret_line = get_caret_line();
	const int caret_column = get_caret_column();
	const String line = get_line(caret_line);
	ERR_FAIL_INDEX_MSG(caret_column - 1, line.length(), "Caret column exceeds line length.");
	if (caret_column > 0 && line[caret_column - 1] == '(' && !code_completion_forced) {
		cancel_code_completion();
		return;
	}
	
	int in_string = is_in_string(caret_line, caret_column);
	int first_quote_col = -1;
	if (in_string != -1) {
		Point2 string_start_pos = get_delimiter_start_position(caret_line, caret_column);
		first_quote_col = (string_start_pos.y == caret_line) ? string_start_pos.x : -1;
	} else if (caret_column > 0) {
		if (is_in_string(caret_line, caret_column - 1) != -1) {
			first_quote_col = caret_column - 1;
		}
	}
	int cofs = caret_column;
	String string_to_complete;
	bool prev_is_word = false;
	
	if (caret_column > 0 && in_string == -1 && first_quote_col == cofs - 1) {
		cancel_code_completion();
		return;