add sat option for doing a global simplification before the bounded search and the main CDCL search loop. The option is also used for the sat-preprocess tacitc (#4514)

Co-authored-by: rainoftime <rainoftime@gmail.com>

src/sat/sat_config.h

@@ -108,6 +108,7 @@ namespace sat {
         double             m_random_freq;
         unsigned           m_random_seed;
         unsigned           m_burst_search;
+        bool               m_enable_pre_simplify;
         unsigned           m_max_conflicts;
         unsigned           m_num_threads;
         bool               m_ddfw_search;