SCANPY-83 Update cirrus-modules to v3 (#104)

Author: ghislainpiot

.cirrus.star

@@ -1,4 +1,4 @@
-load("github.com/SonarSource/cirrus-modules@v2", "load_features")
+load("github.com/SonarSource/cirrus-modules@v3", "load_features")
 
 def main(ctx):
   return load_features(ctx)

.cirrus.yml

@@ -18,7 +18,6 @@ container_definition: &CONTAINER_DEFINITION
   cluster_name: ${CIRRUS_CLUSTER_NAME}
   region: eu-central-1
   namespace: default
-  builder_subnet_ids: ${CIRRUS_AWS_SUBNETS}
   builder_role: cirrus-builder
   builder_image: docker-builder-v*
   builder_instance_type: t3.small