feat: detect if accounts have code via bytecode .size() rather than .hash()

This may help fix @ameziane's performance issue.

Note: this deviates from the spec which identifies empty code using a
comparison to

    KECCAK(())

It should be functionally equivalent.

Author: OlivierBBB

arithmetization/src/main/java/net/consensys/linea/zktracer/module/hub/AccountSnapshot.java

@@ -281,6 +281,6 @@ public EWord tracedCodeHash() {
   }
 
   public boolean tracedHasCode() {
-    return !this.tracedCodeHash().equals(EWord.of(Hash.EMPTY));
+    return !this.deploymentStatus() && !this.code().isEmpty();
   }
 }