chore: Add OpenShift integration tests issue template

[Techassi]

Part of #602

It might be worth looking into this plugin, to auto-select parameters using the links below.

Preview (on ac9005c)

Pre-Release OpenShift Integration Tests

Part of https://github.com/stackabletech/issues/issues/TRACKING_ISSUE

Make sure to run the tests using the following parameters:

TEST_PLATFORM: OpenShift on replicated.com (4.15.0-okd)
GIT_BRANCH_OR_TAG: origin/main
OPERATOR_VERSION: 0.0.0-dev
TEST_SCRIPT_PARAMS: --test-suite openshift

Integration Tests on OpenShift

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1. airflow-operator
2. commons-operator
3. druid-operator
4. edc-operator
5. hbase-operator
6. hdfs-operator
7. hello-world-operator
8. hive-operator
9. kafka-operator
10. listener-operator
11. nifi-operator
12. opa-operator
13. secret-operator
14. spark-k8s-operator
15. superset-operator
16. trino-operator
17. zookeeper-operator