ParamSpec allowed to be used before import

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Note: if you are reporting a wrong signature of a function or a class in the standard library, then the typeshed tracker is better suited for this report: https://github.com/python/typeshed/issues.

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**Describe the bug**
In the event that the ParamSpec or TypeVar constructs are used prior to being imported from the typing module, they don't report an error if they are imported after their first use.

**Code or Screenshots**

```python
P = ParamSpec("P") # Should error, doesn't
R = TypeVar("R")

from typing import TypeVar, ParamSpec
```

**Pyright-playground link**

https://pyright-play.net/?code=AoAgvCwIYE5QtgZQA4FMDGAKARMbBKAWACgAlcEAFQE80A1WHUgkkgMxgHt4QAXWgJYA7AOYgB8ZJxi8qtVAxgAaSLAQoMJIA

**version of pyright**
pyright 1.1.403

Start with the Pyright playground link and reproduce the example using pyright 1.1.403, checking the diagnostics before the later typing import. The issue is done when ParamSpec and TypeVar uses before their imports report errors consistently.

Written by the indexing model from the issue text.