Vertical merges of wide parts fail if there is an array in the table and not all columns are present in parts.
```sql
CREATE TABLE aaa 
(
  a   Array(Int16),
  b   Int8
)
ENGINE = MergeTree
ORDER BY tuple() 
settings
    vertical_merge_algorithm_min_columns_to_activate=1,
    vertical_merge_algorithm_min_rows_to_activate=1,
    min_bytes_for_wide_part=0;

insert into aaa select [], 0;
alter table aaa clear column b;

optimize table aaa final;

Received exception from server (version 22.4.2):
Code: 16. DB::Exception: Received from localhost:9000. 
DB::Exception: There is no column a.size0 in table. (NO_SUCH_COLUMN_IN_TABLE)
```
{
    throw Exception("Method 'loadIndexGranularity' is not implemented for part with type " + getType().toString(), ErrorCodes::NOT_IMPLEMENTED);
}
void IMergeTreeDataPart::appendFilesOfIndexGranularity(Strings & ) const
{
}
void IMergeTreeDataPart::loadIndex()
{
    
    if (!index_granularity.isInitialized())
        throw Exception("Index granularity is not loaded before index loading", ErrorCodes::LOGICAL_ERROR);
    auto metadata_snapshot = storage.getInMemoryMetadataPtr();
    if (parent_part)
        metadata_snapshot = metadata_snapshot->projections.get(name).metadata;
    const auto & primary_key = metadata_snapshot->getPrimaryKey();
    size_t key_size = primary_key.column_names.size();
    if (key_size)
    {
        MutableColumns loaded_index;