[21131] Make Blackbox tests not include any private API

[Mario-DL]

Description

This PR removes private API from Blackbox tests. Essentially, any include within <rtps/

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• NO 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
• Any new/modified methods have been properly documented using Doxygen.
• NO Any new configuration API has an equivalent XML API (with the corresponding XSD extension)
• ❌ Changes are backport compatible: they do NOT break ABI nor change library core behavior.
• ❌ Changes are API compatible.
• New feature has been added to the versions.md file (if applicable).
• New feature has been documented/Current behavior is correctly described in the documentation.
  • Related documentation PR: [21131] Added test_shared_mem_transport_descriptor to api_reference Fast-DDS-docs#820
• NO 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.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.