Investigate (and potentially implement) informer names for BuildGenericConfig #4495

With 1.37 upstream introduced a new feature to give informers names. This is mainly used for metrics. However implementing this feature in kcp is a bit more tricky than just threading it through, so it is disabled for now. Specifically we build Configs for each of our logicalclusters and we have to ensure that their names would be unique across a full kcp installation. This is a problem upstream does not have as they essentially build one per process.

For this task we need to figure out what unqiue naming we could use, then revert our changes in UPSTREAM: <carry>: generic cleanup to implement this feature for generic configs.

All of these I did not want to be doing in the rebase itself, so it is disabled for now.