release.py disagrees with index.ts as of which teztnets actually exist

[nicolasochem]

release.py loops through the teztnets folders and publishes one teztnet per found folder. However, sometimes we comment out the relevant instantiation of the pulumi resource in index.ts

index.ts should dynamically instantiate component resources based on which folders are here. it will force us to actually destroy the folder when we destroy a teztnet.