chore: remove CSI registration path migration job

[xeniape]

Description

Implements #608

--- PASS: kuttl (200.72s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/listener_openshift-false (76.63s)
        --- PASS: kuttl/harness/tls-truststore_openshift-false (7.71s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-3072_custom-secret-names-True (92.25s)
        --- PASS: kuttl/harness/cert-manager-tls_openshift-false (58.91s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-2048_custom-secret-names-True (13.85s)
        --- PASS: kuttl/harness/kerberos_krb5-1.21.1_openshift-false (75.59s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-2048_custom-secret-names-False (18.90s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-3072_custom-secret-names-False (43.62s)
PASS

Release Note Snippet

Remove CSI registration path migration job (init-container) from secret-operator-daemonset.

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker