Prepare algorithm on execution

The execute script was not calling prepare.

This a new step for API V2 before execution of the algorithm itself

added 8 commits

• df7d3e20...5bc1af63 - 7 commits from branch master
• 6548af94 - [scripts][execute] Prepare algorithm

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enabled an automatic merge when the pipeline for 6548af94 succeeds

merged

mentioned in commit 36bb8d18