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.

检查链接的 GitHub 仓库设置页面中的规则集，并将其与现有的分支保护规则进行比较。确认旧规则中对 nodejs-github-bot 的 push 限制是否可以替换或移除，同时不影响 pull request。完成的标准是仓库具有预期的单一分支保护配置。