Simplify converting `simbad` results to `Table`
Simplify converting `simbad` results to `Table`

`SimbadBibcodeResult.table` and `SimbadObjectIDsResult.table` have been
simplified. Most importantly they no longer construct the required
`Table` row-by-row because adding rows to a `Table` is expensive.

imbasimba/astroquery,imbasimba/astroquery