Drop TestCompareCliDriver and related code from tests

The driver has been introduced back in 2015 (HIVE-6010) aiming to run queries with vectorization on/off and comparing the results. However it didn't receive much attention since then and currently only two queries are run with this driver.

The majority of tests aiming to ensure vectorization works correctly use the TestMiniLlapLocalCliDriver and run a query twice switching on/off the necessary properties.

Summing up having the TestCompareCliDriver in the repo leads to extra code maintenance cost without significant benefit.