[CI][Benchmarks] Display all legend items in charts

[PatKamin]

Don't truncate legend, always display all legend items.

[pbalcer]

can you show a screenshot with the difference?

[PatKamin]

can you show a screenshot with the difference?

See the truncation before the change. I've disabled most of series to show that more legend items are hidden below the chart:

Now all legend items are visible:

[pbalcer]

Makes sense, but the proper solution here is to make sure we don't have groups with dozens and dozens of series ;)

We need to refactor SubmitGraph to be grouped more like SubmitKernel.

[PatKamin]

Makes sense, but the proper solution here is to make sure we don't have groups with dozens and dozens of series ;)

We need to refactor SubmitGraph to be grouped more like SubmitKernel.

There is also an old TODO in compute.py for this ;) I think this can be done in another PR.

[PatKamin]

@intel/llvm-gatekeepers, please merge