[x] Commit messages follow the project guidelines.
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 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
[x] The PR has a milestone assigned.
[x] The title and description correctly express the PR's purpose.
[x] Check contributor checklist is correct.
[x] Check CI results: changes do not issue any warning.
[x] Check CI results: failing tests are unrelated with the changes.
Description
This PR migrates fastrtps namespace to fastdds. Related Fast DDS PR:
Contributor Checklist
Reviewer Checklist