[21696] Fix `SecurityManager` assertion in `Secure DS`

[Mario-DL]

Description

This PR addresses an assertion triggering in the SecurityManager as a consequence of not being able to retrieve a new change for the participant_stateless_msg_writer

@Mergifyio backport 3.1.x 3.0.x

Contributor Checklist

• [X] Commit messages follow the project guidelines.
• [X] The code follows the style guidelines of this project.
• [X] 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
• [X] Any new/modified methods have been properly documented using Doxygen.
• [X] Any new configuration API has an equivalent XML API (with the corresponding XSD extension)
• [X] Changes are backport compatible: they do NOT break ABI nor change library core behavior.
• [X] 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.
• [X] 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.