[22706] Warn about XTypes in Fast DDS v3 (backport #1021)

[mergify]

Description

This PR warns about XTypes in the migration guide to Fast DDS v3.

@Mergifyio backport 3.1.x 3.0.x

Related implementation PR:

• [22706] Warn about XTypes in Fast DDS v3 Fast-DDS#5601

Contributor Checklist

• Commit messages follow the project guidelines.
• Code snippets related to the added documentation have been provided.
• Documentation tests pass locally.
• 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.
• CI passes without warnings or errors.

---

This is an automatic backport of pull request #1021 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of c16c505 has failed:

On branch mergify/bp/3.0.x/pr-1021
Your branch is up to date with 'origin/3.0.x'.

You are currently cherry-picking commit c16c505.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   code/DDSCodeTester.cpp
	modified:   code/XMLTester.xml
	modified:   docs/fastdds/property_policies/non_consolidated_qos.rst
	modified:   docs/fastdds/troubleshooting/troubleshooting.rst

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/notes/migration_guide.rst

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