[False positive] `py/call-to-non-callable` on _decorated_ `__call__` magic methods

Hi there,

thanks a stack for bringing LGTM to CodeQL. We used your kickstart template PR https://github.com/crate/crash/pull/373 for making the transition happen on one of our Python repositories and wanted to report back about a potential false positive, after mitigating all other admonitions on our end before.

With kind regards,
Andreas.

**Description of the false positive**

`py/call-to-non-callable` is raised on _decorated_ `__call__` magic methods.

**Code samples or links to source code**

```python
class FooBarCommand(Command):

@noargs_command
def __call__(self, cmd, *args, **kwargs):
return f"{cmd}: foobar"
```

- There is a corresponding PR, including the offending code, in a repro repository at https://github.com/crate-workbench/codeql-evaluations/pull/3.

**URL to the alert on GitHub code scanning (optional)**

- https://github.com/crate/crash/security/code-scanning/5
- https://github.com/crate-workbench/codeql-evaluations/security/code-scanning/1

**Thoughts**

I wonder if anything can be done about it, other than manually dismissing corresponding admonitions? Do you have any other suggestions on this matter?