Add fuzzing test to expose unexpected bugs

[binbin-li]

What would you like to be added?

Current unit test cases are not fuzzed, Ratify could utilize go fuzzing to generate random data to help expose bugs and detect vulnerabilities.

There was a closed PR adding a fuzzing test as an example. #1441 But it didn't actually address any bugs. We would need to investigate how fuzzing tests could help build confidence on Ratify.

Tracking issue for:

• https://github.com/deislabs/ratify/security/code-scanning/32

Anything else you would like to add?

No response

Are you willing to submit PRs to contribute to this feature?

• Yes, I am willing to implement it.