Address remaining Ogre2 heightmap comments

[iche033]

Signed-off-by: Ian Chen [email protected]

🦟 Bug fix

Summary

addressed remaining style changes mentioned in #386 and added a point light to the heightmap demo to showcase support for shadows in ogre2.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

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[codecov]

Codecov Report

Merging #416 (71f7fa5) into main (56b30dc) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #416   +/-   ##
=======================================
  Coverage   55.05%   55.06%           
=======================================
  Files         191      191           
  Lines       19265    19265           
=======================================
+ Hits        10607    10608    +1     
+ Misses       8658     8657    -1     

Impacted Files	Coverage Δ
ogre2/src/Ogre2Scene.cc	76.69% <ø> (ø)
ogre2/src/Ogre2RenderEngine.cc	79.80% <100.00%> (ø)
...e/ignition/rendering/base/BaseGaussianNoisePass.hh	100.00% <0.00%> (+3.33%)	⬆️

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