Disable Lambda versions

Previously deploys functions won't be removed by Serverless or AWS. It
just piles up. For Lambda@Edge it's necessary, but the image scaler
always uses the latest deployed version.

When you don't want to disable versions use your own copy of
serverless.example.yml.

serverless.yml

@@ -12,6 +12,7 @@ provider:
   iam:
     role: ${env:SERVERLESS_ROLE}
   runtime: nodejs16.x
+  versionFunctions: false
   deploymentBucket:
     name: ${env:DEPLOYMENT_BUCKET}
   environment: