Array type matches any table

Nobody has claimed this yet.

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

Other

### Which OS are you using?

Linux

### What is the issue affecting?

Type Checking

### Expected Behaviour

When assigning a class/key-value table to a type defined as an array, a diagnostics error should be raised.

### Actual Behaviour

No diagnostics error is raised.

### Reproduction steps

```lua
local dict = {a = 'a'}

---@type number[]
local array = dict
```
Observe that no diagnostics error is raised when assigning `dict` to `array`, which is defined as an array.

### Additional Notes

`lua-langauge-server` should check for the presence of non-integer indices in a table. If there are any, the table should not match the array type.

I believe the present issue is the underlying issue in #1721.

### Version

3.13.6-1

The issue names no source file or test. Start by running the provided Lua reproduction with lua-language-server 3.13.6-1 and trace the type-checking path for table-to-array assignment. Done means a diagnostic is reported for a table containing a non-integer key while valid arrays remain accepted.

Written by the indexing model from the issue text.