Delete rels without transaction inside storage

[acquamarin]

1. Adds the storage support for rel-deletion (without transaction):
   We store the deletedRelIDs in listUpdateStore, and the scanRelID will be responsible for set those deleted rels to unselected state in the valueVector.
2. Moves the relID property to the first property of the relTable (We used to put it at the end of the relTable's property list).
3. Solved issue Relstatistics refactor #891

[semihsalihoglu-uw]

This looks confusing and I actually don't understand the logic. I'd rather be explicit about how tablesStatisticsContentForWriteTrx->nextRelID is incremented. Note that nextRelID should only be incremented. So I would do it in one of the updateNumRelsByValueForTable if the value is positive. I know setNumRelsForTable is also called by in_mem_rel_copier, so we need a way to set it then too. I can think of 2 things:

1. Maybe in_mem_rel_copier can also just call one of the updateNumRels functions.
2. If that won't work, you can have a wrapper function setNumTuples(table_id_t relTableID, uint64_t numRels) which only sets numTuples. And another function incrementNextRelID, which is called both from the updateNumRels function. and in_mem_rel_copier explicitly.

Let me know if you want to discuss this.

[acquamarin]

I created a new function:

void RelsStatistics::updateNumRelsByValue(
    table_id_t relTableID, table_id_t srcTableID, table_id_t dstTableID, int64_t value) {
    lock_t lck{mtx};
    initTableStatisticPerTableForWriteTrxIfNecessary();
    auto relStatistics =
        (RelStatistics*)tablesStatisticsContentForWriteTrx->tableStatisticPerTable[relTableID]
            .get();
    auto numRelsAfterUpdate = relStatistics->getNumTuples() + value;
    relStatistics->setNumTuples(numRelsAfterUpdate);
    for (auto relDirection : REL_DIRECTIONS) {
        auto relStatistics =
            (RelStatistics*)tablesStatisticsContentForWriteTrx->tableStatisticPerTable
                .at(relTableID)
                .get();
        relStatistics->numRelsPerDirectionBoundTable[relDirection].at(
            relDirection == FWD ? srcTableID : dstTableID) += value;
    }
    // Update the nextRelID only when we are inserting rels.
    if (value > 0) {
        tablesStatisticsContentForWriteTrx->nextRelID += value;
    }
    assertNumRelsIsSound(relStatistics->numRelsPerDirectionBoundTable[FWD], numRelsAfterUpdate);
    assertNumRelsIsSound(relStatistics->numRelsPerDirectionBoundTable[BWD], numRelsAfterUpdate);
}

It will only update the relID if we are inserting rels.