Support reportUnnecessaryComparison for class instances

**Describe the bug**

NOTE: This is feature request not bug report.

If I compare class instance(e.g., UUID) to others in strict mode, I get no error. I know this is not a bug since `__eq__` can receive `object`. But I think `reportUnnecessaryComparison` can be applied to class instances, as it works for scalar types such as `int`, `str` and so on.

**Code or Screenshots**

```python
import uuid

a: uuid.UUID = uuid.uuid4()
b: int = 1
# this is not error
# but it would be helpful if pyright can detect this and raise reportUnnecessaryComparison error.
_ = a == b
```

playground: https://pyright-play.net/?pyrightVersion=1.1.410&pythonVersion=3.13&strict=true&code=JYWwDg9gTgLgBAVwcAJgWAFCYIYC5HIoB0AqiQJIAicAvAakUqgCwAUAlJgEb7AB28OgEZMAfVpxstOlyA

Start with the linked pyright-play example and its strict-mode configuration to reproduce the missing diagnostic. Locate the implementation and tests for reportUnnecessaryComparison, then add coverage for comparing a UUID instance with an int; done means the requested diagnostic is reported without breaking valid class-instance comparisons.

Written by the indexing model from the issue text.