Support column_list in CONTAINS clause

Previously in Babelfish, the feature of fulltext search for simple terms in CONTAINS clause was not supported for multiple columns. The TSQL syntax of Fulltext search for simple terms in CONTAINS clause over multiple columns was unidentifiable over TDS endpoint of Babelfish and would throw syntax error. To fix this, we have created a new grammar to support the TSQL multiple column Fulltext search syntax for simple terms in CONTAINS clause over TDS endpoint of Bablefish. To check version upgrades failures, recreated deprecated sql functions.

TASK: BABEL-4239
Signed-off-by: Jaspal Singh [email protected]