Bugfix/pl 1797 aedes persistence redis scalability fix

[jbaramidze]

The plugin has scalability issues:

1. Keeping track of all subscriptions in a local trie
2. Reading all retained topic's messages on client subscriptions

Both of them were needed because MQTT generally allows subscriptions by wildcards, and the most optimal data structure for such searches is a prefix tree (aka trie). The problem was that Redis does not support such data structure, and thus things had to be kept locally, on each node.

As we removed the wildcard support, there is no more need to keep the local trie => scalability issues solved.

[Zip753]

overall looks good 👍 I didn't look at the tests much, and I would refactor createRetainedStreamCombi according to the suggestions just to be extra safe that we're not doing anything illegal on streams in this critical API