chore: get major updates that pass tests

[HonkingGoose]

Changes:

• Create a config that will get us "easy major updates" automatically

Context:

Right now we have to click on major type updates on our Dependency Dashboard to try out the update on a branch with tests. This means that we won't know if any major type update is actually an easy merge until we do manual work to get the update PR from Renovate.

I think we can improve our workflow by letting Renovate:

1. Create a branch for major type updates, and do not open PR yet
2. GitHub runs tests on the branch
3. If test pass -> open PR for major update (probably an easy merge)
4. If tests fail -> do not open PR, wait for a maintainer to "force" the PR via the Dependency Dashboard.

[rarkins]

I'm not sure we want major PRs within hours of them being released though, even if they pass. Before this we probably need the new "majorStreamDelay" feature (sorry, forget which name I proposed) inside Renovate so that we can wait at least a week or two

[viceice]

@rarkins Yes, sounds good.