👷 configure renovate to not create PRs before stable

[bcaudan]

Motivation

Following #3850, the dependency PRs are created before the the stability check passes (cf current #3981).
It could be nicer if the PR is created when it is ready to be merged.

Changes

Delay PR creation following renovate docs:

Suppress branch/PR creation for X days
If you use minimumReleaseAge=3 days, prCreation="not-pending" and internalChecksFilter="strict" then Renovate only creates branches when 3 (or more days) have passed since the version was released. We recommend you set dependencyDashboard=true, so you can see these pending PRs.

Test instructions

Let's see if it behaves as expected after merging

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.