Duplicate "go to definition" results when using table assignment syntax in a module

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

Kakoune

### Which OS are you using?

MacOS

### What is the issue affecting?

Other

### Expected Behaviour

When a module is written by assigning functions to table members with the following syntax:

```lua
local lib={}

lib.func = function()
-- ...
end

return lib
```

Performing a "Go to definition" on this function from another file that `require`s the module should go to the function defintion.

### Actual Behaviour

Instead when doing a "Go to defintion", there are 2 results, and the user must choose one. They both point to the same line, one points to the table member's name and the other to the start of the `function` declaration.

### Reproduction steps

1. Create a project with two files, `lib.lua` and `other.lua`, and populate them as follows:

`lib.lua`:
```lua
local lib={}

lib.func = function() end

return lib
```

`other.lua`:
```lua
local lib = require('lib')

lib.func()
```

2. From `other.lua`, perform a "Go to definition" on `func`. Note that it has two results that must be chosen, one will take you to the table member's name, and the other will take you to the start of the function declaration.

3. Change `lib.lua` to:
```lua
local lib={}

function lib.func() end

return lib
```

4. From `other.lua`, perform a "Go to definition" on `func`. It takes you directly to the start of the function declaration (which is also the table member's name).

### Additional Notes

I know that the `function lib.func()` syntax is preferred, but this is an issue for me when using libraries that use the `lib.func = function()` syntax. I wasn't able to find any discussions of this issue, but it seems likely that others have run into it, so I am wondering if there is a solution that I just haven't found.

### Log File

[file_Users_evanjohnson_sandbox_lua-lsp-test.log](https://github.com/user-attachments/files/21456083/file_Users_evanjohnson_sandbox_lua-lsp-test.log)

Reproduce the duplicate results with the two-file lib.lua and other.lua example, then compare it with the function lib.func() form. Start by tracing the language server's go-to-definition handling for table assignment syntax and use the supplied log file for context. Done means the assignment form returns one definition result at the function declaration.

Written by the indexing model from the issue text.