cilium preflight migrate-identity

    migrate-identity allows migrating to CRD-backed identities while minimizing connection interruptions. It will allocate a CRD-backed identity, with the same numeric security identity, for each cilium security identity defined in the kvstore. When cilium-agents are restarted with identity-allocation-mode set to CRD the numeric identities will then be equivalent between new instances and not-upgraded ones. In cases where the numeric identity is already in-use by a different set of labels, a new numeric identity is created.