id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
1503542001,I_kwDOAMm_X85Znjrx,7390,`Dataset` binary ops ignore `keep_attrs` option,7316393,closed,0,,,0,2022-12-19T20:20:41Z,2023-01-26T17:00:06Z,2023-01-26T17:00:06Z,CONTRIBUTOR,,,,"### What is your issue?

When doing arithmetic operations on two Dataset operands,
the `keep_attrs=True` option is ignored and therefore attributes  not kept.


Minimal example:

```python
import xarray as xr

ds1 = xr.Dataset(
    data_vars={""a"": 1, ""b"": 1},
    attrs={'my_attr': 'value'}
)
ds2 = ds1.copy(deep=True)

with xr.set_options(keep_attrs=True):
    print(ds1 + ds2)
```
This is not true for DataArrays/Variables which do take `keep_attrs` into account.

### Proposed fix/improvement
Datasets to behave the same as DataArray/Variables, and keep attributes during binary operations
when `keep_attrs=True` option is set. 

PR is inbound.
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