duplicate-set-field diagnostic when assigning a function to a table field

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### 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?

Diagnostics/Syntax Checking

### Expected Behaviour

No diagnostic warning on assignment because the variable has been 'cleared'.

### Actual Behaviour

The two info.func assignments that are "= function" get a Duplicate field 'func' (duplicate-set-field) diagnostic.
The info.func assignment "= l1" does not.
Scope depth does not seem to impact the diagnostic - within the same function.

Assignments to other fields that are string, integer, etc do not get the diagnostic.
FYI - the ".func" is expected in a library I cannot change.

### Reproduction steps

local function l1()
end
local function f1()
local info = {};
do
info = {};
info.notCheckable = true
info.func = function()
-- any code
end
end
info = {};
info.notCheckable = true
info.func = function()
-- any code
end
info = {};
info.notCheckable = true
info.func = l1
end

### Additional Notes

_No response_

### Log File

_No response_

Commencez par les étapes de reproduction et le diagnostic duplicate-set-field du sous-système Diagnostics/Syntax Checking. Comparez les trois affectations de info.func dans l’extrait Lua fourni, puis localisez les tests existants du diagnostic ou son implémentation. Le travail est terminé lorsque les deux affectations de fonctions inline ne produisent plus l’avertissement signalé, tandis que l’affectation de l1 et les autres vérifications de duplicate-field restent couvertes.

Rédigé par le modèle d'indexation à partir du texte de l'issue.