Classes with `cached_property` can't be cloudpickled

I believe this is a bug.

Here is an example:

```py
from functools import cached_property
import pickle
import cloudpickle

class MyExample:
def __init__(self, foo):
self.foo = foo

@cached_property
def bar(self) -> int:
return self.foo * 3

example = MyExample(2)
pickle.dumps(example) # works
cloudpickle.dumps(example) # crashes
```

This fails with `TypeError: cannot pickle '_thread.RLock' object`.