Shell script to run kibana tests on cloud via Jenkins (#21107)

* Shell script to run kibana tests on cloud via Jenkins

* Add comment explaining cloud setup

test/scripts/jenkins_cloud.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# This script runs kibana tests compatible with cloud.
+#
+# The cloud instance setup is done in the elastic/elastic-stack-testing framework,
+# where the following environment variables are set pointing to the cloud instance.
+# 
+# export TEST_KIBANA_HOSTNAME
+# export TEST_KIBANA_PROTOCOL=
+# export TEST_KIBANA_PORT=
+# export TEST_KIBANA_USER=
+# export TEST_KIBANA_PASS=
+#
+# export TEST_ES_HOSTNAME=
+# export TEST_ES_PROTOCOL=
+# export TEST_ES_PORT=
+# export TEST_ES_USER=
+# export TEST_ES_PASS=
+#
+
+set -e
+
+source "$(dirname $0)/../../src/dev/ci_setup/setup.sh"
+
+xvfb-run node scripts/functional_test_runner --debug --grep @skipcloud --invert
+