Commits on Oct 17, 2022

1. roachtest: introduce admission-control/elastic-cdc …

   Part of cockroachdb#89208. This test sets up a 3-node CRDB cluster on 8vCPU
   machines running 1000-warehouse TPC-C, and kicks off a few changefeed
   backfills concurrently. We've observed latency spikes during backfills
   because of its CPU/scan-heavy nature -- it can elevate CPU scheduling
   latencies which in turn translates to an increase in foreground latency.
   
   Also in this commit: routing std{err,out} from prometheus/grafana setup
   that roachtests do to the logger in scope.
   
   Release note: None

   

   irfansharif committed Oct 17, 2022
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