s3api: reuse prefetched entry in versioned DELETE operations

Update deleteSpecificObjectVersion() to accept an optional prefetchedEntry
parameter. When the entry was already fetched by enforceObjectLockProtections(),
it is now passed through to avoid a duplicate filer lookup.

This optimization applies to:
- DELETE specific version (versionId specified)
- DELETE null version (suspended versioning)
- DeleteMultipleObjects for versioned buckets

Performance impact:
- Versioned DELETE: reduces filer lookups from 2 to 1 (50% reduction)
- Non-versioned DELETE: no change (requires gRPC protocol changes)

0 files changed, 0 insertions, 0 deletions