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.

Examinez le ruleset sur la page liée des paramètres du dépôt GitHub et comparez-le avec la règle de protection de branche existante. Confirmez si la restriction de push de nodejs-github-bot de l’ancienne règle peut être remplacée ou supprimée sans perturber les pull requests. Le travail est terminé lorsque le dépôt dispose de l’unique configuration de protection de branche prévue.