[DocDB] IntentAwareIterator::Next() does not advance intent iterator

Jira Link: DB-11515

Description

Current implementation of the method:

void IntentAwareIterator::Next() {
  VLOG_WITH_FUNC(4);

  if (!status_.ok()) {
    return;
  }

  if (IsEntryRegular()) {
    SkipFutureRecords<Direction::kForward>(iter_.Next());
    FillEntry();
  }
}

There is no logic for the intent_iter_, which seems wrong as it should be moved next in some cases.

Currently, the method is used only from GetHelperBase::Prepare() for the row getter initialization. And it does not lead to any inconsistency, but gives an extra decoding (i.e. for a packed record or delete record) and maybe one extra Seek/Next call.

Issue Type

kind/bug

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