crimson/osd/object_context_loader: fix with_clone_obc on resolve_oid case

crimson/osd/object_context_loader: fix with_clone_obc on resolve_oid case

Resolve_oid on a clone object may actually return the head:
```
    // Because oid.snap > ss.seq, we are trying to read from a snapshot
    // taken after the most recent write to this object. Read from head.
```

In this case, with_clone_obc should apply `func` same as with_head_obc would have.

Note: previously, with_clone_obc_only was called on the resolved head object.
While it didn't cause any errors, using the head_obc as clone is wrong.

Signed-off-by: Matan Breizman <mbreizma@redhat.com>