Describe the problem

From 23.1 testcluster. We had high CPU usage for a couple of hours under the following cluster setting

root@localhost:26257/defaultdb> show cluster setting server.cpu_profile.cpu_usage_combined_threshold;
  server.cpu_profile.cpu_usage_combined_threshold
---------------------------------------------------
                                               75
(1 row)

but no profiles were taken. It took me a couple of hours to realize the obvious - I hadn't also set server.cpu_profile.enabled. This caught me by surprise because the combined_threshold description also allows disabling (by setting to a value > 100).

We should remove the .enabled setting. It's confusing to have two ways to disable/enable this.

Jira issue: CRDB-27225