feat(postgres): add TSVECTOR datatype and `@@` operator (#12955)

Pedro Augusto de Paula Barbosa
2021-01-27T00:37:49-03:00

Co-authored-by: Jano Kacer &lt;jan@vestberry.com&gt;
Co-authored-by: Sébastien BRAMILLE &lt;2752200+oktapodia@users.noreply.github.com&gt;