shellcheck: silence trap-only cleanup warning in Boot_Systemd_Validate

Add a targeted SC2317 annotation for the trap-invoked cleanup function in
Boot_Systemd_Validate/run.sh without changing runtime behavior.

Signed-off-by: Srikanth Muppandam <smuppand@qti.qualcomm.com>

Author: smuppand

Runner/suites/Performance/Boot_Systemd_Validate/run.sh

@@ -257,6 +257,7 @@ check_dependencies systemctl systemd-analyze uname sed awk grep find sort || {
 
 # --- ensure CPU governors restored on exit (only if we changed it) ---
 GOV_CHANGED=0
+# shellcheck disable=SC2317  # cleanup is invoked via trap
 cleanup() {
   if [ "$GOV_CHANGED" -eq 1 ] 2>/dev/null; then
     restore_governor