fix(lib): return success from maybe_reload_networkd when no reload is needed

maybe_reload_networkd runs under an EXIT trap with set -e. The branch that skips networkctl reload used `[ -v EC2_IF_INITIAL_SETUP ] && debug ...`. When EC2_IF_INITIAL_SETUP is unset (typical refresh runs), the test fails with status 1, the trap returns non-zero, and systemd reports failure even though setup-policy-routes completed successfully.

Author: mjnowen

lib/lib.sh

@@ -617,7 +617,9 @@ maybe_reload_networkd() {
             networkctl reload
             debug "Reloaded networkd"
         else
-            [ -v EC2_IF_INITIAL_SETUP ] && debug "No networkd reload needed"
+            if [ -v EC2_IF_INITIAL_SETUP ]; then
+                debug "No networkd reload needed"
+            fi
         fi
     else
         debug "Deferring networkd reload to another process"