Automation improvments and adding chain <= 3.0.2 and

[darkpills]

Making improvements for automation usage of this repo:

• Removing "prints" in some chains
• Adding {ZIP_PARAM} and {CALLBACK_URL} in marshal chains
• Splitting marshal chains in rce and detection types
• Replacing {CALLBACK_URL} with {CALLBACK_DOMAIN} because it is not a full URL and we just need a callback domain to detect the deserialization
• Adding chain marshal <= 3.0.2 from https://devcraft.io/2021/01/07/universal-deserialisation-gadget-for-ruby-2-x-3-x.html

[darkpills]

Hello, did you have the time to check this PR?