* Part 1: Add `core_user.type`

With the addition of API keys and "api key users", we want to add a `type` field to users to easily distinguish
between "regular" users and API key users.

The one non-standard user we have right now is the "internal" Metabase user. We don't actually need this field for
that one (because we fix that user's ID to `13371338`), but we might as well set the `type` correctly anyway.

* Part 2: API Key table

Create an API Key table to contain, uh, API keys.

The table has the following fields:

- id

- user_id (the associated API key user, who this API key "acts as")

- key (the hash of the API key itself)

- key_prefix (the first 7 digits of the *raw* API key, beginning with `mb_XXXX`)

- created_by (the user that created the API key)

- created_at

- updated_at

* Part 3: Set the type of the internal user

The internal user is actually identified by the ID, but we might as well set the type correctly.


Finally: don't condition view recompilation on is-prod? since Cypress actually runs the backend in prod mode

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Co-authored-by: Noah Moss <noahbmoss@gmail.com>