Workaround on warnings for Ubuntu Noble

[j-rivero]

• Add pragma ignores for Woverloaded-virtual
• Ignore the warning on FindCUDA removal

🦟 Bug fix

Summary

The support for Ubuntu Noble needs a couple of tweaks for new warnings.

• GCC warnings coming from Noble warnings: API pure virtual overrides/hidden overrides #991. To preserve the ABI in gz-rendering8 I'm adding pragmas to ignore the warnings and keep the ABI as it is currently.
• CMake is complaining about the use of FindCUDA module, which is being removed. The transition was not trivial to me and the Optix component probably does not worth too much effort at this point so I'm just silencing the warning by now.

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.

[iche033]

cmake error here on Jammy:

  CMake Error at CMakeLists.txt:176 (cmake_policy):
    Policy "CMP0146" is not known to this version of CMake.