Feature/publish-participant-hostname

[trittsv]

Description

This PR (re-)adds publishing the hostname of a participant.
For debugging tools it is very important to know the hostname to correctly draw an entire tree of the system (human readable).
It was broken by #5592 a few months ago, this PR aims the goal to fix it.

It is especially important for system integrator companies like us who are using multiple DDS-Vendors in a system.
A common practice between (most) vendors are publishing the host-name for human readability. It is very important for debugging large systems.

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• [N/A] Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added; the added tests pass locally
• [N/A] Any new/modified methods have been properly documented using Doxygen.
• [N/A] Any new configuration API has an equivalent XML API (with the corresponding XSD extension)
• [N/A] Changes are backport compatible: they do NOT break ABI nor change library core behavior.
• Changes are API compatible.
• [N/A] New feature has been added to the versions.md file (if applicable).
• [N/A] New feature has been documented/Current behavior is correctly described in the documentation.
• [N/A] Applicable backports have been included in the description.

Reviewer Checklist

• The PR has a milestone assigned.
• The title and description correctly express the PR's purpose.
• Check contributor checklist is correct.
• If this is a critical bug fix, backports to the critical-only supported branches have been requested.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.