Undefined global `var` in a function which has injected `var` into env

**Describe the bug**
`luv -v`: `LuaJIT 2.1.0-beta3 -- Copyright (C) 2005-2022 Mike Pall. https://luajit.org/`

```lua
local A = {}

function A.sync(executor)
local env = getfenv(executor)
env.await = A.wait
-- ......
executor()
end

function A.wait(promise)
print('go')
end

A.sync(function()
await() -- Undefined global `await`.
end)

return A
```

**Expected behavior**
No `Undefined global`

If it's hard to fix, how can I trick the server into treating `awati` as a global variable but not become an item in completion outside the `executor` function.

Reproduce the report with the Lua example in a running Lua language server and inspect how the analyzer handles getfenv, injected environment members, and global diagnostics. No source file or test is named in the issue, so first locate the relevant global-analysis and completion entry points. Done means await is not reported as undefined inside the executor while remaining absent from completion outside it.

Written by the indexing model from the issue text.