create simplifier_solver wrapper to supply simplifier layer

move sat_smt_preprocess to solver
fix bugs in model_reconstruction_trail for dependency replay

This is a preparatory step for exposing pre-processing as tactics.

src/solver/simplifier_solver.h

@@ -0,0 +1,25 @@
+/*++
+Copyright (c) 2023 Microsoft Corporation
+
+Module Name:
+
+    simplifier_solver.cpp
+
+Abstract:
+
+    Implements a solver with simplifying pre-processing.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2023-01-30
+
+--*/
+#pragma once
+
+#include "util/params.h"
+
+class solver;
+class solver_factory;
+
+solver * mk_simplifier_solver(solver * s);
+