Compute roots for unfinalized by_range requests with fork-choice (#7098)

Includes PRs

- https://github.com/sigp/lighthouse/pull/7058
- https://github.com/sigp/lighthouse/pull/7066

Cleaner for the `release-v7.0.0` branch

beacon_node/http_api/Cargo.toml

@@ -28,6 +28,7 @@ metrics = { workspace = true }
 network = { workspace = true }
 operation_pool = { workspace = true }
 parking_lot = { workspace = true }
+proto_array = { workspace = true }
 rand = { workspace = true }
 safe_arith = { workspace = true }
 sensitive_url = { workspace = true }