Merge branch '20522-load-dispatch-priv-key'

closes #20522

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curii.com>

diff --cc lib/cloud/cloudtest/cmd.go
Simple merge

diff --cc lib/config/config.default.yml
Simple merge

diff --cc lib/dispatchcloud/dispatcher.go
Simple merge

diff --cc lib/dispatchcloud/worker/pool.go
Simple merge