Harden verification OpenStack CLI calls to use JSON output

[tusharjadhav3302]

Summary

• Replace fragile openstack … -f value / -c / csv+grep usage in verification with -f json and structured Ansible (or jq) parsing.
• Fixes the 4.23-class failure on floating ip show … -c fixed_ip_address -f value → Invalid formatter provided in check_lb_svc.yml.
• Covers Priority A verification path only: LB FIP checks, cinder CSI AZ lookup, Swift registry object scan, prometheus PVC volume check, and manila catalog presence.

Test plan

• ansible-lint / dry-read touched YAML
• Confirm OSC -f json keys locally if possible (fixed_ip_address, vip_address, provider, availability_zone)
• Watch next shiftstack-rhel9-rhoso18.0-ocp423 (and other version nightlies): LB FIP task must not fail with Invalid formatter provided; cinder/registry/prometheus/manila checks still pass when enabled

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[openshift-ci]

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[tusharjadhav3302]

Manual validation on shiftstackclient (serval71 / MR !2584 env)

openstack floating ip show <ip> -f {json,yaml,shell,table,value} all fail with Invalid formatter provided (despite help listing those formatters).

Working approach:

openstack floating ip list --floating-ip-address <fip> -f json
# keys: "Floating IP Address", "Fixed IP Address", "ID", ...

openstack loadbalancer list -f json works (keys: vip_address, provider, …).

Pushed a follow-up commit switching FIP lookup/removal checks to floating ip list.