[linstor] support encryption secret

[kvaps]

What this PR does

ref https://github.com/cozystack/website/pull/282

Release note

[]

Summary by CodeRabbit

• New Features
  • The configuration now automatically includes the passphrase secret for Linstor if it exists in your namespace, simplifying setup and management.

[coderabbitai[bot]]

Walkthrough

The Helm template for the LinstorCluster resource was updated to conditionally add the linstorPassphraseSecret field in its specification. This field is now only included if a Secret named linstor-passphrase exists in the release namespace, using the Helm lookup function for detection.

Changes

Cohort / File(s)	Change Summary
Helm Template Conditional Secret Reference packages/system/linstor/templates/cluster.yaml	Updated Helm template logic to include linstorPassphraseSecret in the spec only if the corresponding Secret exists.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A secret in the cluster, hidden from the crowd,
Only if it’s present, will its name be said aloud.
Helm now checks before it writes,
Ensuring specs are clean and right.
Rabbits hop with glee today—
Conditional fields now lead the way! 🐇✨

[!NOTE]

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Learn more here, or try it out under "Finishing Touches" below.

✨ Finishing Touches

🧪 Generate unit tests

• [ ] Create PR with unit tests
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• [ ] Commit unit tests in branch linstor-encryption

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