:farmer: gz-msgs8 clang warning regarding protobuf `nodiscard` attribute in mac sonoma/sequoia

[miguelgonrod]

Environment

• OS Version: Mac sonoma
• Source

Description

• Expected behavior: To build without warnings
• Actual behavior: Building with warnings

Steps to reproduce

1. Go to https://build.osrfoundation.org/job/gz_msgs-ci-ign-msgs8-homebrew-arm64
2. Build a job
3. See the warning

Reference Build

• https://build.osrfoundation.org/job/gz_msgs-ci-ign-msgs8-homebrew-arm64

Log Output

1 warning generated.
warning: unknown warning option '-Wno-extended-offsetof'; did you mean '-Wno-invalid-offsetof'? [-Wunknown-warning-option]
/Users/jenkins/jenkins-agent/workspace/gz_msgs-ci-ign-msgs8-homebrew-arm64/gz-msgs/src/Factory.cc:254:5: warning: ignoring return value of function declared with 'nodiscard' attribute [-Wunused-result]
  254 |     google::protobuf::TextFormat::ParseFromString(_args, msg.get());
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~
2 warnings generated.
warning: unknown warning option '-Wno-extended-offsetof'; did you mean '-Wno-invalid-offsetof'? [-Wunknown-warning-option]
1 warning generated.

This warning began to show up in build #45, but looks like protobuf warning more than gazebo

CC: @Crola1702