[feature]: add rerecord assertion

### Is there an existing feature request for this?

- [X] I have searched the existing issues

### Summary

we need to add rerecord assertion to compare responses between original testcase and rerecorded testcase

### Why should this be worked on?

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### Repository

keploy

The issue does not name files, tests, or an entry point. First inspect the rerecording and assertion flows in the Keploy repository and clarify how original and rerecorded responses should be compared. Done should include a defined assertion behavior and coverage for matching and differing responses.

Written by the indexing model from the issue text.