Cleanup Update to Node 24 + One New Feature

[timoteialbu]

• Update to Node 24.
• Update to ESM only (this was a result of updating the @actions packages, which are now ESM only, which trickled into broken tests etc).
• Feat: As I was testing this in https://github.com/GetJobber/Jobber/pull/73753, I realized that if we run the same action twice, it always keeps the last one, meaning it overrides the comment it posts. So we have a "bug" in a sense because I am pretty sure we expected the action to post for each of the configs we ran on it, which is not currently the case. I debated using config-file as the differentiator, but landed on a new comment-key input instead (its simpler, backwards compatible, does not need to hash the path in case the path is weird etc)

QA

I've run this in https://github.com/GetJobber/Jobber/pull/73753 and you can see 2 comments being made.