Finished renaming default builder to nix instead of crate2nix

Author: soenkeliebau

template/Tiltfile

@@ -6,12 +6,12 @@ registry = settings.get('default_registry', 'oci.stackable.tech/sandbox')
 default_registry(registry)
 
 # Configure which builder to use from config file, defaults to 'nix'
-builder = settings.get('builder', 'crate2nix')
+builder = settings.get('builder', 'nix')
 
 meta = read_json('nix/meta.json')
 operator_name = meta['operator']['name']
 
-if builder == 'crate2nix':
+if builder == 'nix':
     custom_build(
         registry + '/' + operator_name,
         'make regenerate-nix && nix-build . -A docker --argstr dockerName "${EXPECTED_REGISTRY}/' + operator_name + '" && ./result/load-image | docker load',