[Deps] Add "pyyaml==6.0.1" dependency to Dockerfile

[iksnagreb]

More of a personal preference, but I assume I am not alone. I like to specify my model or "experiment" configurations as well as the metrics collected in YAML format instead of JSON, see here for an example: https://github.com/iksnagreb/attention-dummy/blob/benchmark/params.yaml

I think it does not hurt to add a YAML parser into the finn container, at least it should not interfere with anything else and I do not expect frequent changes to this dependency either.

See Xilinx#966

[bwintermann]

This seems to crash with the changes that you did with the VitisOptStrategy enum @LinusJungemann, can you take a look?

[iksnagreb]

Oh, no, you should not have merged our dev here, this is a mirror of the upstream PR, you now extended my existing PR to Xilinx/dev to also include our dev... This one should have actually just been a single line to Dockerfile (+ the recent upstream dev, which we would have synchronized anyway soon...). Was there actually a conflict you tried to resolve by merging dev?

[bwintermann]

Oh damn sorry overlooked this. No I just wanted to sync the part_map line which I mistakenly thought would already be in our dev too but didn't see it was from your own repo.