Log Used Soft- and Hardware and Wall-Clock Time

[fsschneider]

• Runners should also log the wall-clock time for logged values. We can extract the aforementioned time to achieve a target error in the post-processing step.
• For completeness, and as DeepOBS is still being developed, it would be good to track version and hardware information in the same .json file (e.g. torch, torchvision, deepobs, tensorflow versions + hardware info)

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To Do

We will do the following steps for version 1.2.0:

• [ ] Add logging of wall-clock time.
• [ ] Add logging of used software.
• [ ] Add logging of used hardware.