Auto-complete for table keys with @type breaks on non-locals

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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?

Completion

### Expected Behaviour

Using `---@type table` on a table should always keep auto-complete available for keys within the table.

### Actual Behaviour

Auto-complete breaks if the table that `---@type` was used on is global or within a class.

### Reproduction steps

Scenario where auto-complete works:

```lua
---@class MyClass
---@field MyThings any

---@type table
local SomeTable = {
SomeKey = {MyField = 1},
SomeKey2 = {MyField = 1},
}
```

Scenario where auto-complete does not work:
```lua
---@class MyClass
---@field MyThings any

---@type table
SomeTable = {
SomeKey = {MyField = 1},
SomeKey2 = {MyField = 1},
}
```
No auto-complete will be available for `SomeTable` there. This also occurs if `SomeTable` is within a table marked with `---@class`.

### Additional Notes

_No response_

### Log File

_No response_

Reproduce the two table-key completion scenarios in the Visual Studio Code extension, comparing local, global, and class-contained tables annotated with table. Trace the completion handling for these annotations and verify that key completion remains available in each scenario.

Written by the indexing model from the issue text.