Cannot resolve `TypeDict` into `Union` *only* when the `Union` contains an `Awaitable`

**Describe the bug**

I'm seeing `pyright` fail to type a `TypedDict` **only** when it's resolved into a union that includes a third type (in my example, `Awaitable[T]`). Here is my repro:

```python
from typing import Awaitable, Callable, Generic, TypedDict, TypeVar, Union

T = TypeVar("T")
U = TypeVar("U")

Input = Union[T, Awaitable[T], "Output[T]"]

class Output(Generic[T]):
def apply(self, func: Callable[[T], Input[U]]) -> "Output[U]": ...

class D(TypedDict):
key: str

def accept(x: Input[list[D]]) -> None: ...

# OK: dict literal directly in call has downward type context.
accept([{"key": "v"}])

# ERROR: dict literal inside apply lambda is inferred as dict[str, str], not D.
accept(Output[list[D]]().apply(lambda _: [{"key": "v"}]))
```

The confusing this is that this makes it type-check without errors:

```patch
-Input = Union[T, Awaitable[T], "Output[T]"]
+Input = Union[T, "Output[T]"]
```

Full non-erroring code

```python
from typing import Awaitable, Callable, Generic, TypedDict, TypeVar, Union

T = TypeVar("T")
U = TypeVar("U")

Input = Union[T, "Output[T]"]

class Output(Generic[T]):
def apply(self, func: Callable[[T], Input[U]]) -> "Output[U]": ...

class D(TypedDict):
key: str

def accept(x: Input[list[D]]) -> None: ...

# OK: dict literal directly in call has downward type context.
accept([{"key": "v"}])

# ERROR: dict literal inside apply lambda is inferred as dict[str, str], not D.
accept(Output[list[D]]().apply(lambda _: [{"key": "v"}]))
```

This was observed running the `pyright` CLI at version 1.1.408.

---

Notes:

`mypy --strict` (at version 0.931) type-checks both programs without issue.

https://github.com/microsoft/pyright/issues/10908 implies that these programs should never type-check, but that obviously the case.

Start by reproducing the minimal examples from the issue with the pyright CLI at version 1.1.408, comparing diagnostics with and without Awaitable[T] in Input. Trace the type inference involved in the lambda and TypedDict union, then verify that the intended behavior is covered by a regression test.

Written by the indexing model from the issue text.