Fix Nullable(Tuple) not working with CSV, MsgPack format properly

[nihalzp]

Given,

SET allow_experimental_nullable_tuple_type = 1;
SET engine_file_truncate_on_insert = 1;

CREATE TABLE test_nullable_empty_tuple (c0 Nullable(Tuple())) ENGINE = Memory;
INSERT INTO TABLE test_nullable_empty_tuple (c0) VALUES (()), (NULL), (());

CSV:

INSERT INTO TABLE FUNCTION file(currentDatabase() || '_04019.csv', 'CSV', 'c0 Nullable(Tuple())') SELECT c0 FROM test_nullable_empty_tuple;
-- returns \N \N \N. Should be () \N ()
SELECT c0 FROM file(currentDatabase() || '_04019.csv', 'CSV', 'c0 Nullable(Tuple())');

MsgPack:

SET allow_experimental_nullable_tuple_type = 1;
SET engine_file_truncate_on_insert = 1;

CREATE TABLE test_single (c0 Nullable(Tuple(Int32))) ENGINE = Memory;
INSERT INTO test_single VALUES ((1)), (NULL), ((3));
INSERT INTO TABLE FUNCTION file(currentDatabase() || '_04029_single.msgpack', 'MsgPack', 'c0 Nullable(Tuple(Int32))') SELECT c0 FROM test_single;

-- Throws error but should work
SELECT c0 FROM file(currentDatabase() || '_04029_single.msgpack', 'MsgPack', 'c0 Nullable(Tuple(Int32))');

This PR contains test for other formats as well to make sure they work with empty Nullable(Tuple).

TODO: Currently, Arrow, ArrowStream, and ORC still have problem with Nullable(Tuple) which I will fix later in subsequent PR.

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

Fix CSV, MsgPack format not being able to parse Nullable(Tuple) properly. Closes #99753.

Documentation entry for user-facing changes

• Documentation is written (mandatory for new features)

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Workflow [PR], commit [e1c67a3]

Summary: ✅

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