[APM] Correlations: Consolidate correlation, score and impact columns

[peteharverson]

The latency correlations tab currently displays a Correlation score column, which is a value between 0 and 1, indicating how much the attribute increases latency:

while the failed transactions tab displays Score (a bar) and Impact (High / Medium / Low) columns:

To provide consistency across tabs, the information across the two tabs should be consolidated, ideally showing the value [0-1] and a visual indicator of severity high | med | low | v low.

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[elasticmachine]

Pinging @elastic/ml-ui (:ml)

[sophiec20]

Another benefit, along with consistency, is that we would like to return at least one correlation result. #119613 -- we propose to display at least one result with a v low badge. This would be the only item in the table with nothing to compare it to, so benefits from a literal badge.

[formgeist]

The proposal to align the two tables makes sense to me. I don't foresee we need any design support needed in particular for this if we go with the current score indication in the failed transaction rate table and move over the impact badge to the latency correlations table.

[peteharverson]

Closing as the columns in the Latency and Failed transactions tabs have been consolidated for 8.2.0 in #126683.