SQSCANGHA-48 Migrating cirrus-modules v2 to v3

Author: henryju

.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

@@ -15,7 +15,6 @@ vm_instance_template: &VM_TEMPLATE
   image: docker-builder-v*
   type: t2.small
   region: eu-central-1
-  subnet_id: ${CIRRUS_AWS_SUBNET}
   disk: 10
   cpu: 4
   memory: 16G