feat: Implement user defined table functions #3684
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Description - WIP do not review
Implements #3508
Please note that this PR is stacked upon #3683 so don't review the previous PRs again!
This PR implements user defined table functions. I..e. it allows for the user to provide their own table function implementations in a similar way to how UDFs are implemented using annotations.
Testing done
Added some tests to test UDTFs with different types of parameters and return types are loaded.
Added some more QTT tests
Reviewer checklist