Fixes ign-gazebo3 homebrew build regression (#1661)

[Blast545]

Attempt to address cmakelist problems

Signed-off-by: Crola1702 j.arroyo@uniandes.edu.co
Signed-off-by: Crola1702 j.arroyo@uniandes.edu.co

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 #1663 (7d90f68) into ign-gazebo3 (873b43b) will not change coverage.
The diff coverage is n/a.

❗ Current head 7d90f68 differs from pull request most recent head da2e5ae. Consider uploading reports for the commit da2e5ae to get more accurate results

@@             Coverage Diff              @@
##           ign-gazebo3    #1663   +/-   ##
============================================
  Coverage        77.98%   77.98%           
============================================
  Files              255      255           
  Lines            15041    15041           
============================================
  Hits             11729    11729           
  Misses            3312     3312           

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[scpeters]

I think the problem is in ign-sensors3: gazebosim/gz-sensors#262

[chapulina]

Closing in favor of gazebosim/gz-sensors#262