[Draft] clear/reset/restore feature for mock

[fummicc1]

Other testing framework such as Jest and mockito provide clear / reset / restore feature for mocks. (ref: https://jestjs.io/docs/mock-function-api#mockfnmockclear)

I believe including similar features in Mockolo would be beneficial.

[sidepelican]

I believe including similar features in Mockolo would be beneficial.

Please describe the real situations when you think so.
I don't think it is a good idea to simply imitate becase jest and Swift are very different in both language paradigms and test-driven methods.