[16002] Install public statistics .idl (backport #3038)

[mergify]

This is an automatic backport of pull request #3038 done by Mergify.
Cherry-pick of 2c777cf has failed:

On branch mergify/bp/2.3.x/pr-3038
Your branch is up to date with 'origin/2.3.x'.

You are currently cherry-picking commit 2c777cf31.
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	both modified:   src/cpp/CMakeLists.txt

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[MiguelCompany]

@Mario-DL This had conflicts when backporting. Would you mind fixing them?

[MiguelCompany]

@richiprosima Please test this

[MiguelCompany]

@JLBuenoLopez-eProsima Would you mind reviewing this backport?

[JLBuenoLopez]

LGTM. Checked in Ubuntu succesfully