meta: make code-and-learn PRs fast-trackable

[avivkeller]

Ref: https://github.com/nodejs/node-core-utils/blob/main/lib/pr_checker.js#L276

nodejs/TSC#1878 made me realize that @node-core/utils considers the code-and-learn label to be a fast-trackable label, but our CI auto-gates those PRs and prevents them from being sent to the commit queue. With RenderATL coming up, the CI should be updated to match NCU and allow these PRs through.

[nodejs-github-bot]

Review requested:

• @nodejs/actions

[aduh95]

Let's go the other way around: if you found surprising that code-and-learn Issues related to the Code-and-Learn events and PRs submitted during the events. is a fast-trackable label and our tooling also assumes it's not the case, chances are more folks feel the same, so a "better" way forward is to simplify the rule to only apply to fast-track PRs that do not need to wait for 48 hours to land.