Include the attempt-id in the directory structure of the tools-core #1826
Description
In order to support multiple-attempts, we need to make sure that the output generated for each attempt does not override each other.
We can achieve this by changing the app subfolder to make it unique per-attempt.
In that case, we can concatenate the attempt-id to the app-id.
Points to consider:
- It will be easier to do this transition after we fully migrate to use Tools-API in [FEA] Create a public API to consume user-tools output files #1797