Refactor reader functors

[andyfengHKU]

This PR removes table schema from reader operator and reader functors. This is because as we implement direct scan from file, we don't have a notion of table schema anymore.

The information being exposed to all reader classes are

 struct ReaderConfig {
     FileType fileType = FileType::UNKNOWN;
     std::vector<std::string> filePaths;
     std::vector<std::string> columnNames;
     std::vector<std::unique_ptr<common::LogicalType>> columnTypes;
     std::unique_ptr<CSVReaderConfig> csvReaderConfig = nullptr;

[codecov]

Codecov Report

Patch coverage: 97.52% and project coverage change: -0.03% ⚠️

Comparison is base (9ff7a2a) 90.26% compared to head (88f68a3) 90.23%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2049      +/-   ##
==========================================
- Coverage   90.26%   90.23%   -0.03%     
==========================================
  Files         950      950              
  Lines       33811    33776      -35     
==========================================
- Hits        30520    30479      -41     
- Misses       3291     3297       +6     

Files Changed	Coverage Δ
src/include/binder/binder.h	100.00% <ø> (ø)
.../processor/operator/persistent/reader/csv_reader.h	100.00% <ø> (ø)
src/include/storage/copier/column_chunk.h	94.11% <ø> (ø)
src/include/storage/copier/npy_reader.h	100.00% <ø> (ø)
src/include/storage/copier/table_copy_utils.h	100.00% <ø> (ø)
src/storage/copier/npy_reader.cpp	82.44% <20.00%> (ø)
src/processor/map/map_copy_from.cpp	98.82% <87.50%> (-1.18%)	⬇️
src/binder/bind/bind_copy.cpp	91.89% <100.00%> (+0.78%)	⬆️
src/binder/bind/bind_file_scan.cpp	81.25% <100.00%> (-1.61%)	⬇️
src/common/copier_config/copier_config.cpp	80.00% <100.00%> (ø)
... and 18 more

... and 2 files with indirect coverage changes

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