Fix MapCoordinates class and Add Tests for Uncovered Areas in keras/ops/image.py

[Faisal-Alsrheed]

This PR addresses a

TypeError: MapCoordinates.__init__() missing 1 required positional argument: 'order'

in MapCoordinates by adding a default order=1 in the constructor.

Also,
tests for uncovered areas in ops/image.py are also included for better coverage.

---

Note:

We default to order=1 for linear interpolation, which is generally more commonly used in many applications and preferred choice due to its smoother results than order=0 (nearest neighbor).

---

Changes Made:

• Added default order=1 to MapCoordinates constructor.
• Included tests for uncovered areas in ops/image.py.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.31%. Comparing base (b267f93) to head (c35b1ea).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #19507      +/-   ##
==========================================
+ Coverage   76.28%   76.31%   +0.03%     
==========================================
  Files         367      367              
  Lines       41233    41233              
  Branches     8076     8076              
==========================================
+ Hits        31453    31467      +14     
+ Misses       8059     8052       -7     
+ Partials     1721     1714       -7     

Flag	Coverage Δ
keras	76.16% <100.00%> (+0.03%)	⬆️
keras-jax	60.34% <100.00%> (+0.03%)	⬆️
keras-numpy	54.31% <100.00%> (+0.03%)	⬆️
keras-tensorflow	61.59% <100.00%> (+0.03%)	⬆️
keras-torch	60.45% <100.00%> (+0.03%)	⬆️

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[fchollet]

Nice work -- LGTM!