Add is_deactivated to playlist.user response of get_account

[rickyrombo]

Description

Updates get_account query to add is_deactivated when true to attached user metadata, to prevent flashing deactivated account playlists in the UI on the client while we wait to load users for the full playlists.

Tests

• Tested the account endpoint with dummy data manually inserted into remote dev DB
• Will test E2E with client changes Deactivate Account audius-client#657 post merge/deploy to staging for richer dataset

How will this change be monitored?

N/A

QUESTIONS

• Why do both playlist_library and playlists exist?
  • Answered offline (because library can have folders, order, etc, and doesn't include metadata)
• Why do we not include more data on the users here (or not at all) since we seem to pull user info on the client later anyway?
  • Answered offline (because of performance reasons)