fix(next): conditionally query snapshot field based on localization (#15693)

# Overview

Fixes a query validation error in the Versions view that occurs when
viewing versions for collections without localization enabled.

## Key Changes

- Made the `snapshot` query conditional on localization in
`fetchLatestVersion` calls
- The `snapshot` field only exists in version schemas when
`config.localization` is enabled
- Collections without localization (e.g., trash tests) would fail with
"The following path cannot be queried: snapshot"

- Aligns with the existing pattern already used earlier in the same file

## Design Decisions

The fix follows the existing pattern in the same file where the
`snapshot` filter is conditionally applied:

```typescript
if (localization && draftsEnabled) {
  whereQuery.and.push({ snapshot: { not_equals: true } })
}
```

The two `fetchLatestVersion` calls for `currentlyPublishedVersion` and
`latestDraftVersion` were missing this guard, causing failures when
localization is disabled.

When localization is disabled, no snapshot versions exist anyway, so the
filter is unnecessary.