David Peter 860b95a318 [red-knot] Binary operator inference for union types (#16601) ...

## Summary

Properly handle binary operator inference for union types.

This fixes a bug I noticed while looking at ecosystem results. The MRE
version of it is this:

```py
def sub(x: float, y: float):
    # Red Knot: Operator `-` is unsupported between objects of type `int | float` and `int | float`
    return x - y
```

## Test Plan

- New Markdown tests.
- Expected diff in the ecosystem checks

2025-03-12 08:21:54 +01:00

..

booleans.md

[red-knot] add special case for float/complex (#16166)

2025-02-14 12:24:10 -08:00

classes.md

Don't special-case class instances in binary expression inference (#15161)

2025-01-06 13:50:20 -05:00

custom.md

[red-knot] Add missing imports in mdtests (#15869)

2025-02-03 09:27:29 +00:00

instances.md

[red-knot] detect invalid return type (#16540)

2025-03-12 01:58:59 +00:00

integers.md

[red-knot] Attribute access and the descriptor protocol (#16416)

2025-03-07 22:03:28 +01:00

unions.md

[red-knot] Binary operator inference for union types (#16601)

2025-03-12 08:21:54 +01:00