[PP-1] Base fields miss out on Views data from hook_field_views_data()

Problem/Motivation

#1838242: Provide Views integration for datetime field → uses hook_field_views_data() to add proper views integration. However, due to limitations of the Views API, this mechanism does not work for base table fields.
Datetime is the *only* module that adds field types, apparently (the rest have moved into \Drupal\Core), so until 📌 Allow @FieldType to customize views data Needs work is in this might be overly complicated.

Proposed resolution

TBD

Remaining tasks

Find a solution

User interface changes

N/A

API changes

N/A