fix bugs in bb quickstart

Summary

This fixes two bugs in the big bang quickstart:

1. The kubeconfig is named differently in the quickstart than in k3d, resulting in a broken flux deployment and incorrect instructions. As part of fixing this, we add a --kickstart option to k3d-dev so that the quickstart can be very specific about which kubeconfig to use when calling k3d-dev.sh -I to print the instructions after k3d-dev completes.
2. The --wait option references a pipelines-template wait script that got renamed