chore(db): Remove storage logs dedup migration artifacts (matter-labs…

…#1391)

## What ❔

- Removes artifacts associated with the storage logs dedup migration.
- Does some other minor chores regarding DAL (more error propagation,
guaranteeing lossless conversions, etc.).

## Why ❔

The storage logs dedup migration was completed on all environments.
Artifacts supporting it are now obsolete and can be removed from the
codebase.

## Checklist

- [x] PR title corresponds to the body of PR (we generate changelog
entries from PRs).
- [x] Tests for the changes have been added / updated.
- [x] Documentation comments have been added / updated.
- [x] Code has been formatted via `zk fmt` and `zk lint`.
- [x] Spellcheck has been run via `zk spellcheck`.
- [x] Linkcheck has been run via `zk linkcheck`.

Cargo.toml

@@ -6,7 +6,6 @@ members = [
     "core/bin/external_node",
     "core/bin/merkle_tree_consistency_checker",
     "core/bin/snapshots_creator",
-    "core/bin/storage_logs_dedup_migration",
     "core/bin/system-constants-generator",
     "core/bin/verified_sources_fetcher",
     "core/bin/zksync_server",