Dl wallet store index fix

[neurosis69]

• renamed the indexes according to #13304
• removed index coin_id as there is already an internal index for the PK: sqlite_autoindex_singleton_records_1
• removed index inner_puzzle_hash as I found no SQL query using it
• fixed wrong indexed column for index confirmed_at_height, indexed column was root
• removed index id as there is already an internal index for the PK: sqlite_autoindex_launchers_1
• added index mirrors_launcher_id_index as there is a query here which would benefit from it