**Describe the issue**

Improve feedback when trying to replace a partition with a different index

**Which ClickHouse server version to use**

21.9.5


**How to reproduce**

```
DROP DATABASE IF EXISTS test;

CREATE DATABASE test;

CREATE TABLE test.A (id UInt32, company UInt32, total UInt64) ENGINE=SummingMergeTree() PARTITION BY company PRIMARY KEY (id) ORDER BY (id, company);

INSERT INTO test.A SELECT number%10 as id, number%2 as company, count() as total FROM numbers(100) GROUP BY id,company;

CREATE TABLE test.B (id UInt32, company UInt32, total UInt64) ENGINE=SummingMergeTree() PARTITION BY company ORDER BY (id, company);

ALTER TABLE test.B REPLACE PARTITION '0' FROM test.A;

```

**Error message and/or stacktrace**

```
Received exception from server (version 21.9.5):
Code: 33. DB::Exception: Received from localhost:9000. DB::Exception: Cannot read all data. Bytes read: 0. Bytes expected: 4.. (CANNOT_READ_ALL_DATA)
(query: ALTER TABLE test.B REPLACE PARTITION '0' FROM test.A;)
````

**Expected behavior**

```
Code: 33. DB::Exception: Received from localhost:9000. DB::Exception: Cannot replace partition different index (CANNOT_REPLACE_PARTITION)
(query: ALTER TABLE test.B REPLACE PARTITION '0' FROM test.A;)
```

{
    auto lock = lockParts();
    Int64 max_block_num = 0;
    for (const DataPartPtr & part : data_parts_by_info)
        max_block_num = std::max({max_block_num, part->info.max_block, part->info.mutation});
    return max_block_num;
}
void MergeTreeData::loadDataPartsFromDisk(
    DataPartsVector & broken_parts_to_detach,
    DataPartsVector & duplicate_parts_to_remove,
    ThreadPool & pool,
    size_t num_parts,
    std::queue<std::vector<std::pair<String, DiskPtr>>> & parts_queue,
    bool skip_sanity_checks,
    const MergeTreeSettingsPtr & settings)
{
    
    pool.setMaxThreads(std::min(static_cast<size_t>(settings->max_part_loading_threads), num_parts));
    size_t num_threads = pool.getMaxThreads();
    std::vector<size_t> parts_per_thread(num_threads, num_parts / num_threads);