What problem are you facing?

Trying to upgrade to the v5 Mongo driver and am running into some unexpected behavior with the new `StrictFilter` and `StrictMatchKeysAndValues` util types for potentially undefined types

What driver and relevant dependency versions are you using?

`mongodb@5.5.0`

Steps to reproduce?

```
type TestNestedType = { value?:

}

const test:StrictMatchKeysAndValues<TestNestedType> =

```

When a type is potentially undefined, these new strict types seem to return an `unknown` type

When the type is not optional, the types work as expected 

```
type TestNestedType = { value:

}

const test:StrictMatchKeysAndValues<TestNestedType> =

```