fix: remove provision:true as it would cause failures

[AlessandroPomponio]

I was able to test archive datasets now that #367 has been fixed and it looks like having

  local:
    provision: "true" # <---- Required to create a bucket in the backing store

causes the following error:

An error occurred (BucketAlreadyOwnedByYou) when calling the CreateBucket operation: Your previous request to create the named bucket succeeded and you already own it.

This PR removes it, ensuring the example works