Re-evaluate `--trace-gc` in the tools tier-list

[tony-go]

Hi, Diag family 👋

As mentioned in issue #532, I proposed to add --trace-gc to the tier list. Here is the pull request. You'll find there the discussion we had with @gireeshpunathil and the final statement we had here.

Then another PR was raised to add integration tests between Node.Js and --trace-gc (v8).

IMO, the remaining pillar is the documentation. We already have an API reference documentation. Maybe should we consider creating a guide?

As a Node.Js newcomer, I'd like to see a guide about: "how diagnosis a memory leak" and --trace-gc could be a protagonist there. Feel free to share any thoughts you have on this ^^ I'll probably raise a draft PR in the following days to expose the tree structure of this guide.

With love ❤️

[tony-go]

I started working on a guide a few days ago but nothing strong enough to share it on a PR.

https://www.twitch.tv/videos/1459580297

[tony-go]

Todo(@tony-go): Merge it into the current diagnostic memory doc.

[github-actions]

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