Productionise alerts containerisation

[joe-lipson]

There's been some work on EKS apps like userdetails and lists to bring it up to a production ready level, these need to also be applied to alerts

• remove all environment and domain hard coding
• ensure all resource names are unique across branches and environments
• remove unneeded dependencies from build and deploy buildspecs
• Use regolith and other stack exports where appropriate so we can remove hard coded variables
• remove hardcoded docker image names and tagging, move vars to config as needed
• clean up helm and other cli commands to make them more readable and remove hard coded parameters
• add a teardown step for the deploy pipeline that will remove any helm deployed resources, service accounts and anything else that was created in the deploy
• create the configmap / secrets