[ML] Index Data Visualizer should support histogram type and better handle unsupported types

[qn895]

Describe the bug:
The Index Data Visualizer would not show anything if one of the field is not supported. For example, in this case, one of the fields is of type histogram

Steps to reproduce:

1. Navigate to the index data visualizer
2. Opens an index with histogram data type

Expected behavior:
We should:

1. Support the histogram type
2. Gracefully handle if one of the fields is not supported (so still show the all the other fields that are supported)

Screenshots (if relevant):

[elasticmachine]

Pinging @elastic/ml-ui (:ml)