pyright incorrectly allows & parses await in lambdas

[jakkdl]

Describe the bug
await statements are never allowed in lambda's, but pyright sees no problem with them and treats them as if they're fully valid and will work. Trying to run a file with await in lambda will give a SyntaxError, and mypy also gives an error.

Code or Screenshots

from typing_extensions import assert_type

async def foo() -> int:
    x = lambda: await foo()
    assert_type(x(), int)
    return 5

$ pyright foo.py
0 errors, 0 warnings, 0 informations 

VS Code extension or command-line
command line, version 1.1.388

[erictraut]

This is addressed in pyright 1.1.389