Switch from SpeeDB crate dependency to RocksDB

[dmitrii-ubskii]

What is the goal of this PR?

We replace the dependency on speedb@0.0.4 with rocksdb@0.22.0, which is a drop-in replacement.

[vaticle-bot]

PR Review Checklist

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Trivial Change

• [x] This change is trivial and does not require a code or architecture review.

Code

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Architecture

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