The type information for FDW options is only added to HEAD; remove this
from back branches.  Oversight in commit aa769f80e.

Apply the patch to v12, v13, and v14.

Discussion: https://postgr.es/m/CAPmGK14z92twaKwRoccHbbh5Va5vbRDZcTYYTx50+0JTQ8xx_g@mail.gmail.com