schemachanger:`ALTER PARTITION ... OF INDEX idx@*`

We fallback to the legacy schema changer in the case where we try to configure the zone of all partitions with the same name for all indexes

```
To define replication zones for identically named partitions of a table and its secondary indexes, you can use the @* syntax to save several steps:

ALTER PARTITION us_west OF INDEX vehicles@*
CONFIGURE ZONE USING
num_replicas = 5,
constraints = '[+region=us-west1]';
```

Although, having identically named partitions is not something that our code seems to support correctly: https://github.com/cockroachdb/cockroach/issues/128692#issuecomment-2354020459

Jira issue: CRDB-42261

Epic CRDB-31168