Look at possibilities to vectorize queries

It would be nice to look at the possibilities of querying multiple objects at the same time, as doing it sequentially one-by-one has huge overheads when one has thousands of objects. When a module supports it check it out; or if isn't possible due to the remote API, cross it over.

- [ ] astroquery/alfalfa
- [ ] astroquery/alma
- [ ] astroquery/astrometry_net
- [ ] astroquery/atomic
- [ ] astroquery/besancon
- [ ] astroquery/cadc
- [ ] astroquery/casda
- [ ] astroquery/cds
- [ ] astroquery/cosmosim
- [ ] astroquery/dace
- [ ] astroquery/esa/hsa
- [ ] astroquery/esa/hubble
- [ ] astroquery/esa/iso
- [ ] astroquery/esa/jwst
- [ ] astroquery/esa/xmm_newton
- [ ] astroquery/esasky
- [ ] astroquery/eso
- [ ] astroquery/exoplanet_orbit_database
- [ ] astroquery/fermi
- [ ] astroquery/gaia
- [ ] astroquery/gama
- [ ] astroquery/gemini
- [ ] astroquery/heasarc
- [ ] astroquery/hips2fits
- [ ] astroquery/hitran
- [ ] astroquery/image_cutouts/first
- [ ] astroquery/imcce
- [ ] astroquery/ipac/irsa
- [ ] astroquery/ipac/irsa/ibe
- [ ] astroquery/ipac/irsa/irsa_dust
- [ ] astroquery/ipac/irsa/sha
- [ ] astroquery/ipac/ned
- [ ] astroquery/ipac/nexsci/nasa_exoplanet_archive
- [ ] astroquery/jplhorizons
- [ ] astroquery/jplsbdb
- [ ] astroquery/jplspec
- [ ] astroquery/lamda
- [ ] astroquery/linelists/cdms
- [ ] astroquery/magpis
- [ ] astroquery/mast
- [ ] astroquery/mpc
- [ ] astroquery/nasa_ads
- [ ] astroquery/nist
- [ ] astroquery/nvas
- [ ] astroquery/oac
- [ ] astroquery/ogle
- [ ] astroquery/open_exoplanet_catalogue
- [ ] astroquery/sdss
- [ ] astroquery/sha
- [ ] astroquery/simbad
- [ ] astroquery/skyview
- [ ] astroquery/solarsystem/neodys
- [ ] astroquery/solarsystem/pds
- [ ] astroquery/splatalogue
- [ ] astroquery/svo_fps
- [ ] astroquery/ukidss
- [ ] astroquery/utils
- [ ] astroquery/utils/tap
- [ ] astroquery/vamdc
- [ ] astroquery/vizier
- [ ] astroquery/vo_conesearch
- [ ] astroquery/vsa
- [ ] astroquery/wfau
- [ ] astroquery/xmatch

Start by reviewing the query entry points in the listed astroquery modules and checking whether each remote service supports multi-object requests. Compare the available APIs and mark each checklist item as supported or crossed out when vectorization is not possible. Done means every listed module has been assessed with its result recorded.

Written by the indexing model from the issue text.