test(e2e): rely on precheck for DataExport availability

[eofff]

Description

Remove the runtime skip from the DataExports e2e suite that checked whether the storage-volume-data-manager module is enabled.

The suite already has PrecheckSVDM and PrecheckDataExport labels, so the environment suitability should be handled by prechecks before the test starts.

Why do we need it, and what problem does it solve?

The test duplicated module availability validation in BeforeEach and silently skipped execution when storage-volume-data-manager was disabled.

Prechecks are enough for this condition, and keeping the skip in the test hides configuration issues from the precheck layer.

What is the expected result?

DataExports e2e tests are selected or rejected by the existing prechecks. The test code no longer performs an additional skip based on the storage-volume-data-manager module state.

Checklist

• The code is covered by unit tests.
• e2e tests passed.
• Documentation updated according to the changes.
• Changes were tested in the Kubernetes cluster manually.