feat(cli): print stats/errors breakdown by host

[swist]

Description

This teaches the CLI to print statistics broken down by host if available. It also teaches the CLI to always display stats as a table.

Testing done

Used approval tests (which is why this needs to go in after #7293 )
For local stats only it looks like this:

Local runtime statistics
 -------------------------
  Host | Metric | Value      | Last Message             
 -------------------------------------------------------
  --   | ERROR  |          0 | 2020-08-05T16:28:56.314Z 
  --   | TEST   |          0 | 2020-08-05T16:28:56.314Z 
 -------------------------------------------------------

When data from other nodes is present it looks like so:

Runtime statistics by host
 -------------------------
  Host       | Metric | Value      | Last Message             
 -------------------------------------------------------------
  host1:8001 | ERROR  |          0 | 2020-08-05T16:28:56.314Z 
  host1:8001 | TEST   |          0 | 2020-08-05T16:28:56.314Z 
  host2:8002 | ERROR  |          0 | 2020-08-05T16:28:56.314Z 
  host2:8002 | TEST   |          0 | 2020-08-05T16:28:56.314Z 
  host3:8003 | ERROR  |          0 | 2020-08-05T16:28:56.314Z 
  host3:8003 | TEST   |          0 | 2020-08-05T16:28:56.314Z 
  host4:8004 | ERROR  |          0 | 2020-08-05T16:28:56.314Z 
  host4:8004 | TEST   |          0 | 2020-08-05T16:28:56.314Z 
 -------------------------------------------------------------

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")

[ghost]

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clabot