We have an issue when using external dictionary. Occasionally library bridge called with extDict_libClone and fails with Unknown library method 'extDict_libClone'. And it looks like it is because of at some point `else if (method == "extDict_libNew")` was changed to if (lib_new) with no handling for extDict_libClone inside this new if else statement and reporing an error that extDict_libClone is an unknown method.
So there is a two-line fix to handle extDict_libClone properly.
Error logs that we have:
```
2022.12.16 14:17:44.285088 [ 393573 ] {} <Error> ExternalDictionaries: Could not update cache dictionary 'dict.vhash_s', next update is scheduled at 2022-12-16 14:18:00: Code: 86. DB::Exception: Received error from remote server /extdict_request?version=1&dictionary_id=be2b2cd1-ba57-4658-8d1b-35ef40ab005b&method=extDict_libClone&from_dictionary_id=c3537142-eaa9-4deb-9b65-47eb8ea1dee6. HTTP status code: 500 Internal Server Error, body: Unknown library method 'extDict_libClone'
2022.12.16 14:17:44.387049 [ 399133 ] {} <Error> ExternalDictionaries: Could not update cache dictionary 'dict.vhash_s', next update is scheduled at 2022-12-16 14:17:51: Code: 86. DB::Exception: Received error from remote server /extdict_request?version=1&dictionary_id=0df866ac-6c94-4974-a76c-3940522091b9&method=extDict_libClone&from_dictionary_id=c3537142-eaa9-4deb-9b65-47eb8ea1dee6. HTTP status code: 500 Internal Server Error, body: Unknown library method 'extDict_libClone'
2022.12.16 14:17:44.488468 [ 397769 ] {} <Error> ExternalDictionaries: Could not update cache dictionary 'dict.vhash_s', next update is scheduled at 2022-12-16 14:19:38: Code: 86. DB::Exception: Received error from remote server /extdict_request?version=1&dictionary_id=2d8af321-b669-4526-982b-42c0fabf0e8d&method=extDict_libClone&from_dictionary_id=c3537142-eaa9-4deb-9b65-47eb8ea1dee6. HTTP status code: 500 Internal Server Error, body: Unknown library method 'extDict_libClone'
2022.12.16 14:17:44.489935 [ 398226 ] {datamarts_v_dwh_node0032-241534:0x552da2_1_11} <Error> executeQuery: Code: 510. DB::Exception: Update failed for dictionary 'dict.vhash_s': Code: 510. DB::Exception: Update failed for dictionary dict.vhash_s : Code: 86. DB::Exception: Received error from remote server /extdict_request?version=1&dictionary_id=be2b2cd1-ba57-4658-8d1b-35ef40ab005b&method=extDict_libClone&from_dictionary_id=c3537142-eaa9-4deb-9b65-47eb8ea1dee6. HTTP status code: 500 Internal Server Error, body: Unknown library method 'extDict_libClone'
```
Introduce new `--connection` option, by default as a connection name
`--host` will be used.
And using --connection you also can specify --host and it will be
overwritten.
Follow-up for: #45715
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
