Improve CONTRIBUTING #1616

Job	Run time
HDFS tests / Run HDFS tests	8m 3s
Hive tests / Run Hive tests	4m 34s
Iceberg tests / Run Iceberg tests	5m 14s
MSSQL tests / Run MSSQL tests	4m 16s
Clickhouse tests / Run Clickhouse tests	5m 13s
Oracle tests / Run Oracle tests	4m 25s
MySQL tests / Run MySQL tests	4m 19s
SFTP tests / Run SFTP tests	3m 45s
Unit tests / Run unit tests	3m 0s
WebDAV tests / Run WebDAV tests	4m 22s
Scheduler tests / Run Scheduler tests	1m 19s
FTP tests / Run FTP tests	6m 21s
S3 tests / Run S3 tests	8m 16s
FTPS tests / Run FTPS tests	3m 47s
Samba tests / Run Samba tests	4m 15s
Tests done	19s
	1h 11m 28s

Provide feedback