Clean up duplicated morsel and sharedState between copy node and rel

[ray6080]

No description provided.

[codecov]

Codecov Report

Patch coverage: 98.15% and project coverage change: -0.02 ⚠️

Comparison is base (5931a4a) 91.19% compared to head (09e5211) 91.17%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1834      +/-   ##
==========================================
- Coverage   91.19%   91.17%   -0.02%     
==========================================
  Files         779      780       +1     
  Lines       28650    28614      -36     
==========================================
- Hits        26126    26088      -38     
- Misses       2524     2526       +2     

Impacted Files	Coverage Δ
src/common/copier_config/copier_config.cpp	86.66% <ø> (-1.57%)	⬇️
src/include/processor/operator/copy/read_csv.h	100.00% <ø> (ø)
src/include/processor/operator/copy/read_file.h	100.00% <ø> (ø)
src/include/processor/operator/copy/read_npy.h	100.00% <ø> (ø)
src/include/processor/operator/copy/read_parquet.h	100.00% <ø> (ø)
src/include/storage/copier/rel_copy_executor.h	100.00% <ø> (ø)
src/processor/operator/copy/read_npy.cpp	100.00% <ø> (ø)
src/processor/operator/copy/read_parquet.cpp	100.00% <ø> (ø)
src/storage/copier/table_copy_utils.cpp	70.33% <66.66%> (-3.05%)	⬇️
src/include/storage/copier/rel_copier.h	95.74% <90.00%> (+0.09%)	⬆️
... and 7 more

... and 1 file with indirect coverage changes

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