chore: Add pre-release nightly demo testing issue template

[Techassi]

Part of #602

Preview (on f1bcd78)

Pre-Release Demo Testing on Nightly

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

For each demo, run the following commands:

Note

Record any issues or anomalies during the process in a comment on this issue.
Eg:

:green_circle: **airflow-scheduled-job**

The CRD had been updated and I needed to change the following in the manifest:
...

# Install demo (stable)
stackablectl demo install <DEMO_NAME>

# Get a list of installed operators
stackablectl operator installed

# Sometimes it is necessary to upgrade Helm charts
# First, add the Helm repositories
helm repo add minio https://charts.min.io/
helm repo add bitnami https://charts.bitnami.com/bitnami

# Next, upgrade the charts, i.e.:
helm upgrade minio minio/minio --version x.x.x
helm upgrade postgresql-hive bitnami/postgresql --version x.x.x
helm upgrade postgresql-hive-iceberg bitnami/postgresql --version x.x.x
helm upgrade postgresql-superset bitnami/postgresql --version x.x.x

# Uninstall operators
stackablectl release uninstall <CURRENT_RELEASE>

# Update CRDs to nightly version (on main)
# Repeat this for every operator used by the demo
kubectl replace -f https://raw.githubusercontent.com/stackabletech/commons-operator/main/deploy/helm/commons-operator/crds/crds.yaml
kubectl replace -f https://raw.githubusercontent.com/stackabletech/...-operator/main/deploy/helm/...-operator/crds/crds.yaml

# Install nightly version of operators (use the list from the earlier step
# before deleting the operators)
stackablectl operator install commons ...

# Optionally update the product versions in the CRDs, e.g.:
kubectl patch hbaseclusters/hbase --type='json' -p='[{"op": "replace", "path": "/spec/image/productVersion", "value":"x.x.x"}]' # changed

Testing Demos on Nightly

Preview Give feedback

1. airflow-scheduled-job
2. data-lakehouse-iceberg-trino-spark
3. end-to-end-security
4. hbase-hdfs-load-cycling-data
5. jupyterhub-pyspark-hdfs-anomaly-detection-taxi-data
6. logging
7. nifi-kafka-druid-earthquake-data
8. nifi-kafka-druid-water-level-data
9. signal-processing
10. spark-k8s-anomaly-detection-taxi-data
11. trino-iceberg
12. trino-taxi-data

[NickLarsenNZ]

There are also helm upgrades (sometimes)

# add helm repos for upgrades
helm repo add minio https://charts.min.io/
helm repo add bitnami https://charts.bitnami.com/bitnami

# upgrade postgresql and redis versions
helm upgrade minio minio/minio --version 5.2.0
helm upgrade postgresql-hive bitnami/postgresql --version 15.5.16
helm upgrade postgresql-hive-iceberg bitnami/postgresql --version 15.5.16
helm upgrade postgresql-superset bitnami/postgresql --version 15.5.16

[NickLarsenNZ]

Hit submit too soon and forgot this in the last review.

[NickLarsenNZ]

Sorry, last batch, I promise

[NickLarsenNZ]

LGTM, one non-blocking nit