fix: Don't crash during release upgrade for SDP 25.11

[sbernauer]

Description

Tested using

Fails:

stackablectl re in 25.7 -i secret -i commons
stackablectl re upgrade dev

An unrecoverable error occured: failed to execute release (sub)command

Caused by these errors (recent errors listed first):
 1: failed to upgrade CRDs for release
 2: failed to receive remote content
 3: failed to retrieve remote file contents
 4: HTTP status client error (404 Not Found) for url (https://raw.githubusercontent.com/stackabletech/secret-operator/main/deploy/helm/secret-operator/crds/crds.yaml)

Works:

cargo r -p stackablectl -- re in 25.7 -i secret -i commons
cargo r -p stackablectl -- re upgrade dev

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
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)

Reviewer

• Code contains useful comments
• (Integration-)Test cases added
• Documentation added or updated
• 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