Statement execution integration tests refactor

[sachinpro]

Tests utils in statement.cc like InsertStatement, InsertDirectStatement and InsertStatementUsingDescriptor should be refactored:

1. The signature should be something like <function name>(std::shared_ptr<ODBCHandles> conn, std::string query, std::vector<std::string> data) similar to InsertDataWithSqlPut.
2. The caller should verify the inserted data by fetching.