[DOP-22139] Reset HWM when changing strategy #1203

Job	Run time
Oracle tests / Run Oracle tests	7m 45s
Clickhouse tests / Run Clickhouse tests	8m 6s
MSSQL tests / Run MSSQL tests	7m 16s
Hive tests / Run Hive tests	7m 15s
FTPS tests / Run FTPS tests	7m 1s
HDFS tests / Run HDFS tests	11m 0s
Samba tests / Run Samba tests	6m 54s
MySQL tests / Run MySQL tests	7m 4s
S3 tests / Run S3 tests	11m 0s
SFTP tests / Run SFTP tests	6m 49s
WebDAV tests / Run WebDAV tests	7m 4s
FTP tests / Run FTP tests	10m 4s
Unit tests / Run unit tests	3m 55s
Scheduler tests / Run Scheduler tests	4m 39s
Tests done	19s
	1h 46m 11s

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