Fix build on case-insensitive filesystems

[scpeters]

🦟 Bug fix

Fixes build on case-insensitive filesystems, broken by #449

Summary

The fix in #449 accidentally added the autogenerated gz/common/profiler.hh header file, which conflicts with gz/common/Profiler.hh on filesystems that aren't case-sensitive. This adjusts the cmake to avoid installation of that header file, which is not needed.

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 #453 (29436b9) into ign-common3 (4908754) will not change coverage.
The diff coverage is n/a.

❗ Current head 29436b9 differs from pull request most recent head ce11830. Consider uploading reports for the commit ce11830 to get more accurate results

@@             Coverage Diff              @@
##           ign-common3     #453   +/-   ##
============================================
  Coverage        78.52%   78.52%           
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  Files               72       72           
  Lines             9244     9244           
============================================
  Hits              7259     7259           
  Misses            1985     1985           

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