Improve run.sh for better developer experience (#6945)

* run.sh: Create genesis file for ad-hoc validators

* run.sh: Prefer release under NDEBUG

* run.sh: Add sanity test for run.sh

* run.sh: Conditionally re-gen drone and faucet keys

* Make shellcheck happy

* Address code review comments

* Clean up a bit

ci/test-stable.sh

@@ -121,9 +121,11 @@ test-local-cluster)
   ;;
 esac
 
-echo --- ci/localnet-sanity.sh
-export CARGO_TOOLCHAIN=+"$rust_stable"
 (
-  set -x
+  export CARGO_TOOLCHAIN=+"$rust_stable"
+  echo --- ci/localnet-sanity.sh
   ci/localnet-sanity.sh -x
+
+  echo --- ci/run-sanity.sh
+  ci/run-sanity.sh -x
 )