Update ogre2 symbol visibility macro

[iche033]

🦟 Bug fix

Updated to use GZ_RENDERING_OGRE2_HIDDEN as opposed to DETAIL_GZ_RENDERING_OGRE2_HIDDEN.

We actually could just remove the use of these macros in cc files as they may not be necessary, especially in ionic when symbols are hidden by default.

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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.59%. Comparing base (b07e79d) to head (b46c97f).

Additional details and impacted files

@@                Coverage Diff                @@
##           gz-rendering8     #972      +/-   ##
=================================================
- Coverage          75.59%   75.59%   -0.01%     
=================================================
  Files                177      177              
  Lines              16934    16934              
=================================================
- Hits               12802    12801       -1     
- Misses              4132     4133       +1     

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