Fix 517 - move window_frames module to logical_plan

[jimexist]

Which issue does this PR close?

Based on #506
Closes #517.

Rationale for this change

What changes are included in this PR?

move window_frames module to logical_plan

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

Merging #518 (01d08a7) into master (b84789a) will decrease coverage by 0.01%.
The diff coverage is 70.10%.

@@            Coverage Diff             @@
##           master     #518      +/-   ##
==========================================
- Coverage   76.09%   76.07%   -0.02%     
==========================================
  Files         155      156       +1     
  Lines       26575    26750     +175     
==========================================
+ Hits        20221    20351     +130     
- Misses       6354     6399      +45     

Impacted Files	Coverage Δ
...sta/rust/core/src/serde/logical_plan/from_proto.rs	35.41% <0.00%> (-0.51%)	⬇️
...lista/rust/core/src/serde/logical_plan/to_proto.rs	61.64% <0.00%> (-0.77%)	⬇️
...ta/rust/core/src/serde/physical_plan/from_proto.rs	38.51% <0.00%> (-0.14%)	⬇️
datafusion-cli/src/lib.rs	0.00% <0.00%> (ø)
datafusion-cli/src/main.rs	0.00% <0.00%> (ø)
datafusion/src/optimizer/utils.rs	48.05% <0.00%> (-0.18%)	⬇️
datafusion/src/physical_plan/planner.rs	80.19% <ø> (ø)
datafusion/src/sql/utils.rs	66.54% <50.00%> (-0.25%)	⬇️
datafusion/src/logical_plan/expr.rs	84.56% <81.81%> (-0.05%)	⬇️
datafusion/src/logical_plan/window_frames.rs	86.60% <86.60%> (ø)
... and 3 more

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[alamb]

FYI @houqp -- thanks @jimexist 👍