feat: adding fail on error flag

[alex-ilgayev]

Even though the code is short, I spent some time thinking about how would be best to implement it.
In short, we have the pre script of Cimon and the post script.

The pre script can fail when we don't manage to reach the container's healthy state. If that happens, the CI will fail. For any other error the pre script will continue, and it will fail on the post script`.

In addition, the post script just outputs any log, including stderr the container had, so any possible error in the container (including the ones we had in pre script) would surface in post and fail the CI.

Having said that, I chosed to implement the fail-on-error flag in the following way:

• For pre script, if the container didn't reach healthy status, nothing will happen (not even a warning/error message)
• For post script, if any error happens, it will still return 0 (success), but will create a new job summary with the error message.

I also wanted to reduce the amount of annotation messages and make them more concrete, that's why pre script shows nothing, and for post script, if stderr exists, it will print him, or else just generic container failed... message.

You can see example for such run here: https://github.com/CycodeLabs/cimon-action/actions/runs/4712209939

[danielpacak]

LGTM!