Add needed tooling support for execution-spec-tests (#5030)

Adding the t8n and b11r tool allows Hyperledger besu to produce reference 
tests from the https://github.com/ethereum/execution-spec-tests repository.

* Add t8n tool, or transition tool. Calculates the state changes from a set 
  of transactions against a given parent context
* Add b11r tool, or block-builder tool. Given block parts it can generate a 
  RLP block.
* Change some tracing CLI flags to work better with retesteth

Signed-off-by: Danno Ferrin <danno.ferrin@swirldslabs.com>

consensus/merge/src/main/java/org/hyperledger/besu/consensus/merge/blockcreation/MergeBlockCreator.java

@@ -35,7 +35,7 @@ import java.util.function.Supplier;
 import org.apache.tuweni.bytes.Bytes32;
 
 /** The Merge block creator. */
-public class MergeBlockCreator extends AbstractBlockCreator {
+class MergeBlockCreator extends AbstractBlockCreator {
 
   /**
    * Instantiates a new Merge block creator.
@@ -51,7 +51,7 @@ public class MergeBlockCreator extends AbstractBlockCreator {
    * @param minBlockOccupancyRatio the min block occupancy ratio
    * @param parentHeader the parent header
    */
-  MergeBlockCreator(
+  public MergeBlockCreator(
       final Address coinbase,
       final Supplier<Optional<Long>> targetGasLimitSupplier,
       final ExtraDataCalculator extraDataCalculator,