mcsat heuristic update -- use similar heuristic parameters as in cdclt #396

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	8m 18s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	8m 22s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	3m 52s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	4m 47s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	5m 8s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	5m 31s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	2m 34s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	2m 39s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	7m 56s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	8m 8s
	57m 15s

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