move and rename ValueAnalysisPrecision to VariableTrackingPrecision, additionally all ConfigurationOptions are now extracted into an own class

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/VariableTrackingPrecisionRefactoring@13449 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c