Incorrect type on string-key fields when combined with `[string]`

Nadie ha tomado este issue todavía.

### How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Windows

### What is the issue affecting?

Type Checking

### Expected Behaviour

we have a (generated) class like
```
---@class GlobalModSettings
---@field ["heat-visualizer-updates-per-surface-per-tick"] ModSetting
---@field ["nixie-tube-update-speed-alpha"] ModSetting
---@field ["nixie-tube-update-speed-numeric"] ModSetting
---@field [string] ModSetting<(int32)|(double)|(boolean)|(string)|(Color)>
```

which has narrower types for the known entries and a general type for the "everything else" field, but when i then use this type like
```
local x = settings.global["heat-visualizer-updates-per-surface-per-tick"]
```
`x` is given the type from the `[string]` field, rather than the one that is an exact match for that specific string

### Actual Behaviour

(this template is always off screen and i've written the whole thing in the first box...)

### Reproduction steps

(this template is always off screen and i've written the whole thing in the first box...)

### Additional Notes

_No response_

### Log File

_No response_

No se nombra ningún archivo del repositorio ni ninguna prueba. Empieza reproduciendo la búsqueda anotada de GlobalModSettings en el Lua language server mediante la Visual Studio Code extension y, después, sigue la resolución de tipos de los campos indexados. Se considera terminado cuando un campo con una clave de cadena exacta recibe su tipo más específico en lugar del tipo de campo más amplio [string].

Escrito por el modelo de indexación a partir del texto del issue.