Fix based on Coverity and Sonar audits (part 7) (#22335)
* go.d/rethinkdb: drop degenerate switch in sortRethinkRows Sonar go:S3923: sortRethinkRows() switched on sortColumn but the "durationMs" case and the default branch performed the same descending sort by DurationMs. RethinkDB only exposes durationMs as a server-side sort option (the only column with sortOpt: true in rethinkRunningColumns), so the switch was always going to take one of two identical paths. Drop the switch and sort directly. The unused parameter is renamed to `_` (Go idiom). Behaviour and call shape are unchanged. * Only durationMs is exposed as a sort option, so the function hard-codes the order. Remove the now-unused parameter rather than leaving a stub that suggests sorting is configurable. --------- Co-authored-by: Costa Tsaousis <costa@netdata.cloud>