fix: drop pvc claims if not needed anymore

[Maleware]

Description

Hint: Code was written with the help of Claude.

Resolution of #722.

Author

• Changes are OpenShift compatible
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• 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

[Maleware]

=== NAME  kuttl
    harness.go:430: run tests finished
    harness.go:547: cleaning up
    harness.go:604: removing temp folder: ""
--- PASS: kuttl (270.35s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/tls-truststore_openshift-false_truststore-target-kind-ConfigMap (8.95s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-2048_custom-secret-names-True (43.46s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-2048_custom-secret-names-False (17.86s)
        --- PASS: kuttl/harness/non-sensitive-data (118.58s)
        --- PASS: kuttl/harness/cert-manager-tls_openshift-false (90.80s)
        --- PASS: kuttl/harness/listener_openshift-false (85.39s)
        --- PASS: kuttl/harness/kerberos_krb5-1.21.1_openshift-false (115.61s)
        --- PASS: kuttl/harness/tls-truststore_openshift-false_truststore-target-kind-Secret (7.48s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-3072_custom-secret-names-True (23.00s)
        --- PASS: kuttl/harness/tls_openshift-false_rsa-key-length-3072_custom-secret-names-False (19.70s)
PASS