Autocompleting some strings should place a StringName literal instead of a normal string

[jaymehta-g]

If I have
Input.is_action_pressed("ui_left")
running in _process then if I understand correctly, every single frame it is creating a new String object, comparing it to all currently held input keys letter by letter until it finds a match. But if I run
Input.is_action_pressed(&"ui_left")
, then Godot turns the string into a reference to the same StringName object and every frame the line is much faster.
The problem is that when typing out this line, if I use the auto complete options in the dropdown that appears while I'm typing the name of the input axis, Godot inserts a normal string when it would make much more sense to insert a StringName and be more efficient.

[dalexeev]

This is implemented as 2 editor settings (disabled by default) for future 4.3. See:

• Implement Editor Settings for autocomplete with StringNames and NodePaths #5496
• Add editor settings for autocompletion with NodePath and StringName godot#66481