full_node: More set usage in subscription code

[xdustinface]

Purpose:

Avoid potentially querying duplicated coin states from the DB by just filtering the condition items before and remove some list<>set conversions.

Current Behavior:

1. Query based on a list of subscription items
2. Create a set of CoinState items
3. Convert the set to a list

New Behavior:

1. Query based on a set of subscription items
2. Create a list of CoinState items

Based on:

• util: Improve list_to_batches #15415