change(rfc): Cleanup transparent address index database design

[teor2345]

Motivation

1. We want to name column families after what they actually contain
2. We want to use standard terminology for item changes
3. We want to delete unused database fields

Background

Standard terminology is:
https://en.wikipedia.org/wiki/Create,_read,_update_and_delete

Solution

• Rename two location-based column families using loc
• Use standard terminology for item changes: replace Never with Create
• Remove AddressLocation from utxo_by_out_loc

Review

@conradoplg asked for the first change in PR #3999, and the third change in Discord.

Reviewer Checklist

• Design makes sense

Follow Up Work

Update with the new names:

• PR 6. feat(db): Add a transparent address UTXO index #3999
• ticket Add tx_loc_by_transparent_addr_loc index to the finalized state #3951

[conradoplg]

Looks good