Feature Description

As we just merged v1alpha2, we should add a feature flag into kcp to fully disable the APIExport virtualworkspaces URL (stop populating). and disable flag by default.

Proposed Solution

Add feature flag EnableDeprecatedAPIExportVirtualWorkspacesUrls and disable it by default.
if flag is disabled, stop populating apiexport v1alpha2 vw urls

Alternative Solutions

No response

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Part of #3292

Additional Context

No response