Benchmarks tools improvements

Context

• Record anomalies , for instance if another benchmarks process is already running.
• Timestamp some events.
• Create whole path if result directory doesn't exist.
• Save results in the cloud (partly answers #4037 (closed)).
• Create status files.

Checklist

• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR