[clickhouse] Use chrono::NaiveDateTime for distributed_ddl_queue endpoint

[karencfv]

Adds a couple of fields (formatted_query_create_time and formatted_query_finish_time) to the response from the clickhouse-admin endpoint to retrieve information from system.distributed_ddl_queue.

@bnaecker suggested in #6986 (comment) that we use SET date_time_output_format = 'iso'; which works great to set the output format within a clickhouse client session, but sadly when using the -q flag with the clickhouse CLI it doesn't really work as multi-statements are not allowed:

$ clickhouse client --port 22001 -q "SET date_time_output_format = 'iso'; SELECT * FROM system.distributed_ddl_queue WHERE cluster = 'oximeter_cluster'"
Code: 62. DB::Exception: Syntax error (Multi-statements are not allowed): failed at position 36 (end of query): ; SELECT * FROM system.distributed_ddl_queue WHERE cluster = 'oximeter_cluster'. . (SYNTAX_ERROR)

I found a workaround though. By using the formatDateTime() function we can add the necessary formatted fields to the response.

$ clickhouse client --port 22001 -q "SELECT *, formatDateTime(query_finish_time, '%Y-%m-%dT%H:%i:%s') AS formatted_query_finish_time FROM system.distributed_ddl_queue WHERE cluster = 'oximeter_cluster' FORMAT JSONEachRow"
{"entry":"query-0000000001","entry_version":5,"initiator_host":"ixchel","initiator_port":22001,"cluster":"oximeter_cluster","query":"CREATE DATABASE IF NOT EXISTS db1 UUID '701a3dd3-10f0-4f5d-b5b2-0ad11bcf2b17' ON CLUSTER oximeter_cluster","settings":{"load_balancing":"random"},"query_create_time":"2024-11-01 16:17:08","host":"::1","port":22001,"status":"Finished","exception_code":0,"exception_text":"","query_finish_time":"2024-11-01 16:17:08","query_duration_ms":"3","formatted_query_finish_time":"2024-11-01T16:17:08"}
{"entry":"query-0000000001","entry_version":5,"initiator_host":"ixchel","initiator_port":22001,"cluster":"oximeter_cluster","query":"CREATE DATABASE IF NOT EXISTS db1 UUID '701a3dd3-10f0-4f5d-b5b2-0ad11bcf2b17' ON CLUSTER oximeter_cluster","settings":{"load_balancing":"random"},"query_create_time":"2024-11-01 16:17:08","host":"::1","port":22002,"status":"Finished","exception_code":0,"exception_text":"","query_finish_time":"2024-11-01 16:17:08","query_duration_ms":"4","formatted_query_finish_time":"2024-11-01T16:17:08"}
{"entry":"query-0000000000","entry_version":5,"initiator_host":"ixchel","initiator_port":22001,"cluster":"oximeter_cluster","query":"CREATE DATABASE IF NOT EXISTS db1 UUID 'a49757e4-179e-42bd-866f-93ac43136e2d' ON CLUSTER oximeter_cluster","settings":{"load_balancing":"random","output_format_json_quote_64bit_integers":"0"},"query_create_time":"2024-11-01 16:16:45","host":"::1","port":22002,"status":"Finished","exception_code":0,"exception_text":"","query_finish_time":"2024-11-01 16:16:45","query_duration_ms":"4","formatted_query_finish_time":"2024-11-01T16:16:45"}
{"entry":"query-0000000000","entry_version":5,"initiator_host":"ixchel","initiator_port":22001,"cluster":"oximeter_cluster","query":"CREATE DATABASE IF NOT EXISTS db1 UUID 'a49757e4-179e-42bd-866f-93ac43136e2d' ON CLUSTER oximeter_cluster","settings":{"load_balancing":"random","output_format_json_quote_64bit_integers":"0"},"query_create_time":"2024-11-01 16:16:45","host":"::1","port":22001,"status":"Finished","exception_code":0,"exception_text":"","query_finish_time":"2024-11-01 16:16:45","query_duration_ms":"4","formatted_query_finish_time":"2024-11-01T16:16:45"}

Perhaps there is a better way to do this? Open to suggestions!