Rework npy copy to integrate with query processor pipeline

[aziz-mu]

This PR implements #1670 , by removing classes specific to NPY reading that aren't needed anymore, implementing a read_npy operator to match the read_csv and read_parquet operators, and making changes to CopyNode so that copying can still be done column-by-column

[aziz-mu]

Note that there's still a bug in the PR - reading large (>2048 rows), multidimensional (e.g. column w/ type INT32[10]) .npy files causes an error. I'm currently working on fixing this, but if it's urgent to get this PR merged to integrate with storage changes for the next release, I propose removing the failing test (which I've done already), and creating an issue for it to be fixed soon. Happy to discuss this further

[mewim]

@aziz-mu Let's wait until the bug is fixed. The main use case of NPY copy is to handle large, high-dimensional data files for PyG workload currently. If there is a bug reading large multidimensional files, this feature will not be very useful.

[ray6080]

These should fix failed tests.

[codecov]

Codecov Report

Patch coverage: 97.78% and project coverage change: +0.13 🎉

Comparison is base (97e3b8e) 90.92% compared to head (c01d26f) 91.05%.

❗ Current head c01d26f differs from pull request most recent head ee9a98c. Consider uploading reports for the commit ee9a98c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1734      +/-   ##
==========================================
+ Coverage   90.92%   91.05%   +0.13%     
==========================================
  Files         774      773       -1     
  Lines       28371    28311      -60     
==========================================
- Hits        25795    25779      -16     
+ Misses       2576     2532      -44     

Impacted Files	Coverage Δ
src/common/vector/value_vector.cpp	100.00% <ø> (ø)
src/include/main/connection.h	100.00% <ø> (ø)
...gical_plan/logical_operator/logical_create_table.h	100.00% <ø> (ø)
src/include/processor/operator/copy/read_file.h	100.00% <ø> (+8.33%)	⬆️
src/include/processor/operator/physical_operator.h	100.00% <ø> (ø)
src/include/processor/physical_plan.h	100.00% <ø> (ø)
src/processor/mapper/map_ddl.cpp	100.00% <ø> (+2.22%)	⬆️
src/storage/copier/npy_reader.cpp	90.67% <92.30%> (-0.07%)	⬇️
src/processor/mapper/map_copy.cpp	95.71% <95.71%> (ø)
src/processor/operator/copy/copy_node.cpp	97.02% <96.96%> (+0.09%)	⬆️
... and 10 more

... and 5 files with indirect coverage changes

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