Issue #3421626 by phenaproxima, Wim Leers, borisson_: Mark config schema types...

Issue #3421626 by phenaproxima, Wim Leers, borisson_: Mark config schema types (field.field_settings.* and field.storage_settings.*)) for field types that have no settings as fully validatable

(cherry picked from commit 7e2b0d45)