Implement multinode testing for Rocky 10

[owenjones]

Multinoding

[gemini-code-assist]

Code Review

This pull request introduces support for Rocky 10 and CentOS Stream 10 by updating repository versions, conditionally enabling Redis or Valkey depending on the OS version, and updating the stackhpc.cephadm collection. It also adds a temporary workaround to set the crypto policy to LEGACY on Rocky 10 during Ceph deployment due to SHA-1 signing keys. Feedback on the changes highlights potential issues in cephadm-deploy.yml where rhel10cis_crypto_policy might be undefined, and suggests wrapping the role execution in a block/always structure to guarantee the crypto policy is restored even if the deployment fails.

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