Rename logical operator dir

[ray6080]

• Move planner/logical_plan to planner/operator in header files to be consistent with its cpp code structure and processor.
• Move logical_copy_from and logical_copy_to from copy to persistent.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% ⚠️

Comparison is base (2e460d6) 90.20% compared to head (fdddd6b) 90.19%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2047      +/-   ##
==========================================
- Coverage   90.20%   90.19%   -0.01%     
==========================================
  Files         945      945              
  Lines       33549    33558       +9     
==========================================
+ Hits        30262    30268       +6     
- Misses       3287     3290       +3     

Files Changed	Coverage Δ
src/c_api/connection.cpp	95.38% <ø> (ø)
src/c_api/prepared_statement.cpp	100.00% <ø> (ø)
src/include/optimizer/acc_hash_join_optimizer.h	100.00% <ø> (ø)
...c/include/optimizer/agg_key_dependency_optimizer.h	100.00% <ø> (ø)
...lude/optimizer/correlated_subquery_unnest_solver.h	100.00% <ø> (ø)
src/include/optimizer/factorization_rewriter.h	100.00% <ø> (ø)
src/include/optimizer/filter_push_down_optimizer.h	100.00% <ø> (ø)
src/include/optimizer/logical_operator_visitor.h	97.43% <ø> (ø)
...include/optimizer/projection_push_down_optimizer.h	100.00% <ø> (ø)
.../include/optimizer/remove_factorization_rewriter.h	100.00% <ø> (ø)
... and 179 more

... and 17 files with indirect coverage changes

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