Show 1D-tensors as bar charts

[teh-cmc]

Relax the bar-chart view's requirements, and strengthen the tensor view's requirements:

• make bar-chart look for either BarChartIndicator or TensorIndicator
• make tensor ignore anything with less than 2 dimensions (it can't display those anyway!)

---

import rerun as rr
import torch
rr.init("tensor", spawn=True)
rr.log("tensor", rr.Tensor(torch.rand(10,)))

---

• Resolves rr.Tensor not working for 1D tensors #3709

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[nikolausWest]

I wonder if it would have made more sense to add an extra dimension instead and treat it like a 1 x N tensor? That way we make it possible for the user to choose what way they'd like to see their data. Like a tensor row or a bar chart depending on the indicator