How to apply different libraries to different files?

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

Visual Studio Code Extension (sumneko.lua)

### Which OS are you using?

MacOS

### What is the issue affecting?

Libraries

### Expected Behaviour

Same variables refer to different definitions, depending on file

### Actual Behaviour

Same variables do not refer to different definitions, depending on file

### Reproduction steps

Create several libraries with different definitions for some global

### Additional Notes

Hi!

This is a question and not a bug report. Imagine, that I have several lua files with global variable named SomeVar:

file1.lua
```
print(SomeVar.X)
```

file2.lua
```
print(SomeVar.Y)
```

and there are two different files with annotations:
addon1/library/annotations1.lua
```
---@class TSomeVar1
---@field X integer
SomeVar = {}
```

addon2/library/annotations2.lua
```
---@class TSomeVar2
---@field Y integer
SomeVar = {}
```

Is there any way to specify that for file "file1.lua" first library should be used, and for "file2.lua" second library should be used?
I think that similar question was referred in this issue https://github.com/LuaLS/lua-language-server/issues/119
But I cannot run many language servers, because number of files can grow very large

### Log File

_No response_

Start by reading the related issue #119 and comparing its discussion with the examples in file1.lua, file2.lua, addon1/library/annotations1.lua, and addon2/library/annotations2.lua. Determine whether the language server supports selecting different libraries per file and identify the configuration or implementation area involved. Done means the per-file behavior is either supported and documented or its limitation is clearly explained.

Written by the indexing model from the issue text.