Include the CGL header on macOS

[mjcarroll]

Fix break from #897

[iche033]

looks good, will wait for CI

[scpeters]

https://build.osrfoundation.org/job/ignition_rendering-ci-pr_any-homebrew-amd64/3218/

[scpeters]

thanks for the quick fix!

[codecov]

Codecov Report

Merging #911 (3be43ed) into gz-rendering8 (8c1fd27) will not change coverage.
The diff coverage is n/a.

❗ Current head 3be43ed differs from pull request most recent head 7788a29. Consider uploading reports for the commit 7788a29 to get more accurate results

@@              Coverage Diff               @@
##           gz-rendering8     #911   +/-   ##
==============================================
  Coverage          75.18%   75.18%           
==============================================
  Files                177      177           
  Lines              16846    16846           
==============================================
  Hits               12665    12665           
  Misses              4181     4181           

Files Changed	Coverage Δ
ogre2/src/Ogre2RenderEngine.cc	68.18% <ø> (ø)

[scpeters]

CI failure seems like a problem with the machine?

https://build.osrfoundation.org/job/gz_rendering-ci-pr_any-jammy-amd64/49/

27: [ RUN      ] HeightmapTest.Heightmap
27: X Error of failed request:  GLXBadDrawable
27:   Major opcode of failed request:  151 (GLX)
27:   Minor opcode of failed request:  5 (X_GLXMakeCurrent)
27:   Serial number of failed request:  58
27:   Current serial number in output stream:  58
27: �[1;36m[Dbg] [CommonRenderingTest.hh:44] �[0m�[1;36mRead GZ_ENGINE_TO_TEST=�[0m�[1;36mogre�[0m�[1;36m�[0m
27: �[1;36m[Dbg] [CommonRenderingTest.hh:47] �[0m�[1;36mRead GZ_ENGINE_BACKEND=�[0m�[1;36mgl3plus�[0m�[1;36m�[0m
27: �[1;32m[Msg] �[0m�[1;32mLoading plugin [�[0m�[1;32mgz-rendering-ogre�[0m�[1;32m]�[0m�[1;32m�[0m
 27/245 Test  #27: INTEGRATION_heightmap_ogre_gl3plus ....................***Failed    0.24 sec

[peci1]

Or it could actually be a wrongly initialized GL context...

[azeey]

I reran the Jammy job and it passed (https://build.osrfoundation.org/job/gz_rendering-ci-pr_any-jammy-amd64/51/), so I'd say this is okay to merge.

[mjcarroll]

Yeah, this should not have altered any jammy specific code paths, so maybe just a flake?