Validate galera templates storageRequest via validation webhook

[stuggi]

Notify the enduser if the configured DB storageRequest is too low for production use. It is not blocking to allow lower settings for test/ci systems. The output would be like:

$ oc apply -n openstack -f core_v1beta1_openstackcontrolplane_galera_network_isolation_3replicas.yaml
Warning: spec.galera.template[openstack-cell1].storageRequest: 1G is not appropriate for production! For production use at least 5G!
Warning: spec.galera.template[openstack].storageRequest: 500M is not appropriate for production! For production use at least 5G!

Depends-On: https://github.com/openstack-k8s-operators/lib-common/pull/522 Depends-On: https://github.com/openstack-k8s-operators/mariadb-operator/pull/234

[softwarefactory-project-zuul[bot]]

This change depends on a change that failed to merge.

Changes https://github.com/openstack-k8s-operators/lib-common/pull/522, https://github.com/openstack-k8s-operators/mariadb-operator/pull/234 are needed.

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abays, stuggi

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/openstack-k8s-operators/openstack-operator/blob/main/OWNERS)~~ [abays,stuggi] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[softwarefactory-project-zuul[bot]]

Build failed (check pipeline). Post recheck (without leading slash) to rerun all jobs. Make sure the failure cause has been resolved before you rerun jobs.

https://review.rdoproject.org/zuul/buildset/fe46947e5f6045b9b330ae8d321601f6

:heavy_check_mark: openstack-k8s-operators-content-provider SUCCESS in 2h 15m 50s :heavy_check_mark: podified-multinode-edpm-deployment-crc SUCCESS in 1h 19m 20s :heavy_check_mark: cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 09m 24s :x: cifmw-data-plane-adoption-osp-17-to-extracted-crc FAILURE in 1h 36m 57s :heavy_check_mark: openstack-operator-tempest-multinode SUCCESS in 1h 48m 43s

[stuggi]

recheck

[abays]

/retest