Check package to test in benchmark in every loop

Check which package is being tested in case of benchmark suite, but
keeping all these test packages in the same step.

.buildkite/pipeline.trigger.integration.tests.sh

@@ -36,13 +36,8 @@ CHECK_PACKAGES_TESTS=(
     test-check-packages-benchmarks
 )
 for test in ${CHECK_PACKAGES_TESTS[@]}; do
-    options=""
-    if [ "${test}" == "test-check-packages-benchmarks" ]; then
-        package_name=$(basename ${package})
-        options="-p ${package_name}"
-    fi
     echo "      - label: \":go: Running integration test: ${test}\""
-    echo "        command: ./.buildkite/scripts/integration_tests.sh -t ${test} ${options}"
+    echo "        command: ./.buildkite/scripts/integration_tests.sh -t ${test}"
     echo "        agents:"
     echo "          provider: \"gcp\""
     echo "        artifact_paths:"

scripts/test-check-packages.sh

@@ -69,21 +69,23 @@ for d in test/packages/${PACKAGE_TEST_TYPE:-other}/${PACKAGE_UNDER_TEST:-*}/; do
     elastic-package install -v
 
     if [ "${PACKAGE_TEST_TYPE:-other}" == "benchmarks" ]; then
-      if [ "${PACKAGE_UNDER_TEST:-*}" == "pipeline_benchmark" ]; then
+      # It is not used PACKAGE_UNDER_TEST, so all benchmark packages are run in the same loop
+      package_to_test=$(basename ${d})
+      if [ "${package_to_test}" == "pipeline_benchmark" ]; then
         rm -rf "${OLDPWD}/build/benchmark-results"
         elastic-package benchmark pipeline -v --report-format xUnit --report-output file --fail-on-missing
-        
+
         rm -rf "${OLDPWD}/build/benchmark-results-old"
         mv "${OLDPWD}/build/benchmark-results" "${OLDPWD}/build/benchmark-results-old"
-        
+
         elastic-package benchmark pipeline -v --report-format json --report-output file --fail-on-missing
-        
+
         elastic-package report --fail-on-missing benchmark \
           --new ${OLDPWD}/build/benchmark-results \
           --old ${OLDPWD}/build/benchmark-results-old \
           --threshold 1 --report-output-path="${OLDPWD}/build/benchreport"
       fi
-      if [ "${PACKAGE_UNDER_TEST:-*}" == "system_benchmark" ]; then
+      if [ "${package_to_test}" == "system_benchmark" ]; then
         elastic-package benchmark system --benchmark logs-benchmark -v --defer-cleanup 1s
       fi
     else