use drop function if exists instead create or replace fior hash functions

src/hive_fork_manager/CMakeLists.txt

src/hive_fork_manager/authorization.sql

...k_manager/hive_fork_manager_update_script_generator.sh.in

src/hive_fork_manager/hived_api.sql

src/hive_fork_manager/table_schema_verification.sql

tests/integration/functional/tools/common.sh

tests/integration/functional/tools/test.sh