Revert "combine jobs to cut down workers and trade time for stability"

This reverts commit d8daf99.

.ci/run.sh

@@ -10,38 +10,35 @@ source src/dev/ci_setup/extract_bootstrap_cache.sh
 source src/dev/ci_setup/setup.sh
 source src/dev/ci_setup/checkout_sibling_es.sh
 
-for _JOB in $(JOB//,/ /)
-do
-  case "$_JOB" in
-  kibana-intake)
-    ./test/scripts/jenkins_unit.sh
-    ;;
-  kibana-ciGroup*)
-    export CI_GROUP="${_JOB##kibana-ciGroup}"
-    ./test/scripts/jenkins_ci_group.sh
-    ;;
-  kibana-visualRegression*)
-    ./test/scripts/jenkins_visual_regression.sh
-    ;;
-  kibana-firefoxSmoke*)
-    ./test/scripts/jenkins_firefox_smoke.sh
-    ;;
-  x-pack-intake)
-    ./test/scripts/jenkins_xpack.sh
-    ;;
-  x-pack-ciGroup*)
-    export CI_GROUP="${_JOB##x-pack-ciGroup}"
-    ./test/scripts/jenkins_xpack_ci_group.sh
-    ;;
-  x-pack-visualRegression*)
-    ./test/scripts/jenkins_xpack_visual_regression.sh
-    ;;
-  x-pack-firefoxSmoke*)
-    ./test/scripts/jenkins_xpack_firefox_smoke.sh
-    ;;
-  *)
-    echo "JOB '$_JOB' is not implemented."
-    exit 1
-    ;;
-  esac
-done
+case "$JOB" in
+kibana-intake)
+  ./test/scripts/jenkins_unit.sh
+  ;;
+kibana-ciGroup*)
+  export CI_GROUP="${JOB##kibana-ciGroup}"
+  ./test/scripts/jenkins_ci_group.sh
+  ;;
+kibana-visualRegression*)
+  ./test/scripts/jenkins_visual_regression.sh
+  ;;
+kibana-firefoxSmoke*)
+  ./test/scripts/jenkins_firefox_smoke.sh
+  ;;
+x-pack-intake)
+  ./test/scripts/jenkins_xpack.sh
+  ;;
+x-pack-ciGroup*)
+  export CI_GROUP="${JOB##x-pack-ciGroup}"
+  ./test/scripts/jenkins_xpack_ci_group.sh
+  ;;
+x-pack-visualRegression*)
+  ./test/scripts/jenkins_xpack_visual_regression.sh
+  ;;
+x-pack-firefoxSmoke*)
+  ./test/scripts/jenkins_xpack_firefox_smoke.sh
+  ;;
+*)
+  echo "JOB '$JOB' is not implemented."
+  exit 1
+  ;;
+esac