Allow for deploying `packages` before BB core/addon components (Spike)
Currently `packages` assume a list of [default](https://repo1.dso.mil/big-bang/bigbang/-/blob/master/chart/templates/package/helmrelease.yaml#L57) `dependsOn` + anything specified by the user.
While this is desired most of the time, there may be cases where someone wants to deploy something before istio, kyverno, etc (potential use-case cert-manager). There is currently no way to enforce this ordering (i.e. have a core package `dependsOn` a `packages` package).
Is this something that Big Bang would be interested in supporting? Immediate use cases I can think of:
- certmanager before istio
- VPA before kyverno (to allow VPA for kyverno)
issue