Followup to #82898 which created the basic infrastructure, configuration scheme, and did experimentation with regular and elastic kv0 traffic.

• Eliminate the need to provide the disk-name and bandwidth fields for common environments e.g. linux with store on EBS or GCP PD. This will make it possible to enable this by default for v23.1.
• We need some more experiments, with user-facing regular SQL traffic and lower-priority (and elastic) background work like index backfills. This overlaps with admission: investigate TPC-E online index creation problem #85641 and admission: metrics and tests for evaluating improvements #85469. Prior experimentation was done over at [WIP] admission: add support for disk bandwidth as a bottleneck resource #82813 (comment).
• admission: roachtest for disk bandwidth limiter  #121576
• Enable for v24.3

cc: @irfansharif @andrewbaptist

Jira issue: CRDB-18968

Epic: CRDB-37479