Address todo in Ogre2ParticleEmitter - override PreRender function

[iche033]

🦟 Bug fix

Summary

Address todo note about an ABI breaking change in Ogre2ParticleEmitter class.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• 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

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #871 (c214a55) into main (54e6140) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

❗ Current head c214a55 differs from pull request most recent head 47c8aa4. Consider uploading reports for the commit 47c8aa4 to get more accurate results

@@            Coverage Diff             @@
##             main     #871      +/-   ##
==========================================
- Coverage   75.03%   75.02%   -0.02%     
==========================================
  Files         176      176              
  Lines       16830    16829       -1     
==========================================
- Hits        12629    12626       -3     
- Misses       4201     4203       +2     

Files Changed	Coverage Δ
ogre2/src/Ogre2ParticleEmitter.cc	78.57% <100.00%> (-0.11%)	⬇️

... and 1 file with indirect coverage changes