GDScript 2.0: When using named enums, accessing invalid members won't be caught while editing

[MuffinManKen]

Godot version

v4.0.alpha6.official [e4f0fc5]

System information

Windows 10

Issue description

If you access an invalid member of a named enum, the editor won't catch the issue, but an error will be thrown at runtime.
If you do the same thing with an unnamed enum, the editor will flag it immediately.

I understand this is likely because named enums are a Dictionary, but it seems to me that it would be an improvement having named enums get flagged in the editor similar to unnamed enums.

Steps to reproduce

See code in repro section

Minimal reproduction project

enum GAME_STATE {WIN, LOSE}

var state1_good = GAME_STATE.WIN
var state1_bad = GAME_STATE.DRAW  #This will throw an error at runtime

enum {STATE_WIN, STATE_LOSE}

var state2_good = STATE_WIN
var state2_bad = STATE_DRAW #This will be flagged in the editor

[Calinou]

Related to #59696.

[anvilfolk]

Added a fix for this one in #69590! :)