False positive in ipaddress._BaseNetwork.subnet_of

### Describe the Bug

```
import ipaddress

supernet = ipaddress.ip_network("10.10.1.0/24")
subnet = ipaddress.ip_network("10.10.1.32/28")
is_subnet = subnet.subnet_of(supernet) # error
```

`ip_network` returns `Ipv4network|Ipv6network`, while the overload of `is_subnet` requires self & other to be the same kind.

In theory it's possible that one of them is ipv4 and the other is ipv6, and we're behaving correctly here according to the type signatures (mypy and pyright do the same thing)

But this is in the standard library so I wonder if we can do better somehow

from https://youtrack.jetbrains.com/issue/PY-86719/Pyrefly-is-way-too-overzealous

### Sandbox Link

https://pyrefly.org/sandbox/?project=N4IgZglgNgpgziAXKOBDAdgEwEYHsAeAdAA4CeSIEAtsbgE4AuABBMappnfHADrp9wArsRh10MZgF4WbDlzhxCrAPriGAd3oBrABQ8QARgAMhY6cJGA9ACYALPoCUAwdjVNprdp25LiqiZp0uvpmoYQAzNY2AByOfBBwykKuEu5MyWqEGRLKuGA6QiJiEg4gADQgZFxgUKSEDLhUUBQAxEwACqTVtekYOARMAMa46JAA5oJ0qAwQI4R8bQDKMDBMABYMDMRwiJaWVTA1dfRjljDolpi4g3CWw6MQE1MzI5ZMYPRMqABuqNCo2FgQxG40m01m6CYuGIL3Qij4ZAYaxGAFpvqI4BC0vpwqZrPo%2BCAAL4VVCDGbogBi0BgFDQWDwRDIxKAA

### (Only applicable for extension issues) IDE Information

_No response_