```release-note:enhancement
resource/aws_kms_key: Add `multi_region` argument
```

```release-note:enhancement
data-source/aws_kms_key: Add `multi_region` and `multi_region_configuration` attributes
```

```release-note:new-resource
aws_kms_replica_key
```

```release-note:enhancement
resource/aws_kms_external_key: Add `multi_region` argument
```

```release-note:new-resource
aws_kms_replica_external_key
```