Backport relocatability fixes

[traversaro]

As merging gazebosim/gz-sim#1968 upstream is taking some time, let's backport the patch here. While this indeed introduces some new ABI symbols, if the symbols ends being changed in the upstream release, we can always re-introduce them with a custom patch, if that turns out to be necessary.

Similar to conda-forge/gz-physics-feedstock#11 .

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[traversaro]

@conda-forge-admin, please rerender

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

This message was generated by GitHub actions workflow run https://github.com/conda-forge/gz-sim-feedstock/actions/runs/5321774113.

[traversaro]

Currently we also have the warning:

2023-06-20T11:32:05.3161857Z /home/conda/feedstock_root/build_artifacts/gz-sim7_1687259193132/work/src/systems/physics/Physics.cc:805:13: warning: 'GZ_PHYSICS_ENGINE_INSTALL_DIR' macro is deprecated, use gz::physics::getEngineInstallDir() function instead. 
2023-06-20T11:32:05.3162561Z   805 |   systemPaths.AddPluginPaths({GZ_PHYSICS_ENGINE_INSTALL_DIR});
2023-06-20T11:32:05.3163187Z       |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  

We should add a local patch for that.

[github-actions]

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I considered the following status checks when analyzing this PR:

• linter: passed
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Thus the PR was not passing and not merged.

[github-actions]

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