Shortest Path changes

[anuchak]

This PR has all the current changes of Shortest Path including frontend and physical operators.

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: -0.04 ⚠️

Comparison is base (35b02b6) 91.84% compared to head (7ba7945) 91.80%.

❗ Current head 7ba7945 differs from pull request most recent head 97bcf9e. Consider uploading reports for the commit 97bcf9e to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1468      +/-   ##
==========================================
- Coverage   91.84%   91.80%   -0.04%     
==========================================
  Files         661      657       -4     
  Lines       23140    23012     -128     
==========================================
- Hits        21252    21126     -126     
+ Misses       1888     1886       -2     

Impacted Files	Coverage Δ
src/include/processor/mapper/plan_mapper.h	100.00% <ø> (ø)
src/include/processor/operator/physical_operator.h	100.00% <ø> (ø)
src/processor/operator/physical_operator.cpp	91.17% <0.00%> (-1.83%)	⬇️
src/common/types/types.cpp	79.61% <100.00%> (ø)

... and 24 files with indirect coverage changes

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[andyfengHKU]

Let's merge the physical operator part and well the test suite. So can u do the following

• Remove code that is not under processor/
• Describe how you generated the test dataset, i.e. what are connectivity pattern.

To pass CI you will need to comment out test code as well.

[anuchak]

All front end related changes for shortest path have been removed.