Dev/mip 278/state and transfer multiple returns

Created by: ThanKarab

Changelog

UDFGenerator:

• Added multiple return logic in the generate_udf_queries output, an object of UDFExecutionQueries is now returned.
• Added support for udfs to return multiple state or transfer output tables.
• Added unit test class _TestGenerateUDFQueries to remove generate_udf_queries duplication. Every test class that inheritcs from it will run this test.
• Fixed tests using a hardcoded monetdb image. Added monetdb build in the unit tests.

NODE:

• The shared task run_udf is refactored to receive UDFExecutionQueries from the udfgenerator.
• The run_udf of the monetdb_interface is now receiving a list of query strings to be executed in the database. The strings received contain only one statement. DROP and CREATE are provided separately.
• Added integrity error retry interval.
• Added test for get_udf, run_udf, run_udf with multiple returns and run_udf time limit exception.

CONTROLLER:

• Added multiple return logic in the run_udf.
• The share_to_local/global parameter in the run_on_locals/global now also supports a tuple of booleans.
• Fixed validator bug where x,y were not optional.
• Fixed algorithm_executor bug where x,y were not optional.
• Added new algorithm with local/global step logic and test for it.

DEPLOYMENT:

• The engine now has a dynamic way of receiving the algorithm path.
• Added an algorithm_folders option in the .deployment.toml file.

TESTS:

• Renamed the test folders based on the environment type used. README added as well.