fix(intersectionBy): dedupes results by iteratee key

[HidenLee]

Previous implementation

• intersectionBy returned every element from the first array whose mapped key appeared in the second array.
• This included multiple items from the first array when they shared the same iteratee key which diverges from Lodash

Relate Issue

• resolve Differences in the behavior of intersectionBy between lodash and es-toolkit #1376

Changes

• for deduplication, filter method should store each mapped item to another set, and compare them as key.
• add a test "should dedupes results by the iteratee key"

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.75%. Comparing base (33ee94e) to head (323bad0).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1396   +/-   ##
=======================================
  Coverage   99.75%   99.75%           
=======================================
  Files         468      468           
  Lines        4439     4445    +6     
  Branches     1309     1310    +1     
=======================================
+ Hits         4428     4434    +6     
  Misses         11       11           

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