[load testing] remove extra loop and pass simulations to running scri…

…pt (elastic#106997) (elastic#107119)

* [load testing] remove loop and pass simulations seq

* pass string, not array to script

* pass var via export

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

Co-authored-by: Dzmitry Lemechko <dzmitry.lemechko@elastic.co>

test/scripts/jenkins_build_load_testing.sh

@@ -8,8 +8,6 @@ do
 done
 echo "Simulation classes: $simulations";
 
-IFS=',' read -ra sim_array <<< "${simulations}"
-
 cd "$KIBANA_DIR"
 source src/dev/ci_setup/setup_env.sh
 
@@ -82,14 +80,11 @@ nohup ./metricbeat > metricbeat.log 2>&1 &
 popd
 
 echo " -> Running gatling load testing"
-for i in "${sim_array[@]}"; do
-  sleep 30
-  echo "Running simulation $i .."
-  export GATLING_SIMULATIONS="$i"
-  node scripts/functional_tests \
-    --kibana-install-dir "$KIBANA_INSTALL_DIR" \
-    --config test/load/config.ts || exit 0;
-done
+export GATLING_SIMULATIONS="$simulations"
+node scripts/functional_tests \
+  --kibana-install-dir "$KIBANA_INSTALL_DIR" \
+  --config test/load/config.ts;
+
 
 echo " -> Simulations run is finished"