Tidy up MX Blueapi service configurations

Blueapi's configuration through ixx-services is now complete on i24, i04 and i02-1, but I've changed a few things as I've learnt more about how it works. There are a few things that need standardising:

i04: Manage the three required secrets through committed sealed secrets - right now they have just been added via terminal commands so the config isn't saved anywhere

i24: Needs to use the mx-bluesky-blueapi helmchart as a dependency - this gives us the zocalo configmap for free so we can remove it from i24-services

i02-1: Needs updating to latest versions, and needs sealed secrets as per i04.