Use VERSION_GREATER_EQUAL in cmake logic

[scpeters]

🦟 Bug fix

Small improvement to cmake logic

Summary

While updating cmake logic as part of gazebosim/gz-cmake#350, I noticed a version comparison using STRGREATER when VERSION_GREATER_EQUAL looks more appropriate to me, since the feature was added in cmake 3.22.

cc @traversaro who added this in #1764

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)
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• All tests passed (See test coverage)
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[traversaro]

cc @traversaro who added this in #1764

Thanks for noticing! Yes, I guess I was just using something old out of habit. actually that was required at the time as we supporting also older versions of CMake.

[traversaro]

Yes, I guess I was just using something old out of habit. actually that was required at the time as we supporting also older versions of CMake.

Actually not, that operator is available since CMake 3.7: https://cmake.org/cmake/help/v3.10/command/if.html , so it was perfectly fine to use it also back then.