Add function calls success rate to metric information

[damilolaedwards]

A good/useful metric to consider adding to medusa would be presenting a comprehensive table showcasing the percentage success rates of functions called by the fuzzer throughout the campaign. Currently, the coverage data collected by Medusa provides information on whether an instruction or line was reached and if there was a revert on that line. However, expanding this coverage data to include details on how many times a function call was successful and how many times it reverted would be nice to have. This additional information would serve as a valuable guide in input value constraints and preconditions. Moreover, it would offer a more accurate reflection of the overall success achieved in the fuzzing campaign.