Ensure one texture per selection buffer per camera.

[hidmic]

🦟 Bug fix

Fixes #664

Summary

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)

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.

[hidmic]

@iche033 while this patch certainly fixes the issue I had over at https://github.com/osrf/lrauv, it's unclear to me how to write a regression test that can trigger it. Adding another camera and ray query pair to RayQuery_TEST.cc won't do.

[codecov]

Codecov Report

Merging #665 (11ca3bf) into main (67ee5db) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #665   +/-   ##
=======================================
  Coverage   53.59%   53.59%           
=======================================
  Files         214      214           
  Lines       21420    21423    +3     
=======================================
+ Hits        11479    11481    +2     
- Misses       9941     9942    +1     

Impacted Files	Coverage Δ
ogre2/src/Ogre2SelectionBuffer.cc	93.06% <100.00%> (+0.08%)	⬆️
include/gz/rendering/base/BaseGaussianNoisePass.hh	96.66% <0.00%> (-3.34%)	⬇️

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[iche033]

@hidmic can you give #666 a try and see if it fixes your use case in lrauv? That' PR tries to see if we can reuse the same render texture. I also updated the RayQuery unit test to trigger the bug.

[hidmic]

Thank you @iche033 !