Problem statement

There are a few repetitive tasks for the project that we have been handling manually until now that should be automated.
They share the common feature that they end up being a PR on the Evergreen source repo itself or another.

Examples:

• running core or plugins upgrades (PR-330, PR-327, PR-326, PR-318, ...)
• updating the backend to latest (example: https://github.com/jenkins-infra/jenkins-infra/pull/1174)
• updating all npm packages (PR-323)
• running npm audit fix to fix vulnerabilities (PR-329)
• ...

Expected behavior

These tasks should be automated. We should write a common tool that makes it easy to file a PR against a given repo with a set of change that a script or so has created.