Required modules' returns' types are wrong when more than a single value is returned

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

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

Windows WSL

### What is the issue affecting?

Type Checking, Diagnostics/Syntax Checking, Libraries

### Expected Behaviour

First type should be a number, second - a string, third - a boolean

### Actual Behaviour


### Reproduction steps

main.lua
```lua
local number, string, boolean = require "required"
```
required.lua
```lua
return 1337, "string", true
```

### Additional Notes

_No response_

### Log File

_No response_

Reproduce the report with main.lua requiring required.lua, where the module returns 1337, "string", and true. Trace the require return-type handling in the language server and verify that the three assigned variables are inferred as number, string, and boolean with correct diagnostics.

Written by the indexing model from the issue text.