core/bloombits: remove old bloombits logic and chain indexer #31081
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This PR is #3 of a 3-part series that implements the new log index intended to replace core/bloombits.
Based on #31079 and #31080
Replaces #30370
This part removes the old bloombits package and the chain indexer that was only used by bloombits. Deletes the old bloombits database.
FilterMaps data structure explanation:
https://gist.github.com/zsfelfoldi/a60795f9da7ae6422f28c7a34e02a07e
Log index generator code overview:
https://gist.github.com/zsfelfoldi/97105dff0b1a4f5ed557924a24b9b9e7
Search pattern matcher code overview:
https://gist.github.com/zsfelfoldi/5981735641c956afb18065e84f8aff34
Note that the possibility of a tree hashing scheme and remote proof protocol are mentioned in the documents above but they are not exactly specified yet. These specs are WIP and will be finalized after the local log indexer/filter code is finalized and merged.