Branch protection improvements

FYI I just created a ruleset for this repo: https://github.com/nodejs/node-core-utils/settings/rules/4654889

It targets the default branch and enables:

• Restrict deletions
• Require linear history
• Require a pull request with at least one approval
• Block force pushes

Only the pull request requirements are new compared to the old branch protection rule (https://github.com/nodejs/node-core-utils/settings/branch_protection_rules/17880641)
I think we can delete that rule. The only thing that remains in it is the restriction of who can push and that only restricts the nodejs-github-bot account. I don't think there's a convenient way to port that to rulesets. We could use the bypass list but then every pull request would always be red and require collaborators to click the bypass checkbox.

Esamina il ruleset nella pagina collegata delle impostazioni del repository GitHub e confrontalo con la regola di protezione del branch esistente. Conferma se la restrizione di push di nodejs-github-bot della vecchia regola può essere sostituita o rimossa senza compromettere le pull request. Il lavoro è completato quando il repository dispone dell’unica configurazione di protezione del branch prevista.