Description of problem:

The custom certificates bundle mounting logic in the operator, added as part of SRVKP-8204, does not deduplicate the custom CA volume mounts and volumes causing the new pods to fail validation and the upgrade to fail

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

• Deploy OSP v0.19.3
• Observe that the CA bundle is mounted as the system ca bundle for all components
• Upgrade to OSP v0.20.0

Actual results:

• Upgrade fails and the operator logs an error like "Install failed with message: Deployment.apps "tekton-triggers-controller" is invalid: [spec.template.spec.volumes[1].name: Duplicate value: "config-trusted-system-cabundle-volume", ..."

  Expected results:

• The upgrade succeeds

  Reproducibility (Always/Intermittent/Only Once):

• Always

  Acceptance criteria: 

• The upgrade succeeds without manual intervention and the components maintain their custom certificates mounted as the system ca-bundle
   

Definition of Done:

• acceptance criteria met
• unit tests added
• upgrade path tested by QE

Build Details:

Build and details are in this slack thread: https://redhat-internal.slack.com/archives/C03A1MBHN81/p1756186351593389

Additional info (Such as Logs, Screenshots, etc):

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