Switch from flake8 to ruff #1693

Job	Run time
MySQL tests / Run MySQL tests	5m 8s
HDFS tests / Run HDFS tests	2m 32s
MSSQL tests / Run MSSQL tests	5m 12s
Clickhouse tests / Run Clickhouse tests	5m 7s
Iceberg tests / Run Iceberg tests	4m 11s
WebDAV tests / Run WebDAV tests	3m 31s
FTP tests / Run FTP tests	2m 44s
Hive tests / Run Hive tests	3m 7s
Samba tests / Run Samba tests	4m 7s
S3 tests / Run S3 tests	3m 33s
Scheduler tests / Run Scheduler tests	1m 39s
SFTP tests / Run SFTP tests	4m 18s
FTPS tests / Run FTPS tests	3m 12s
Unit tests / Run unit tests	2m 39s
Oracle tests / Run Oracle tests	3m 41s
Tests done	1s
	54m 42s

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