[19638] Fix clang warnings (backport #3901)

[mergify]

This is an automatic backport of pull request #3901 done by Mergify.
Cherry-pick of 462f5d7 has failed:

On branch mergify/bp/2.10.x/pr-3901
Your branch is up to date with 'origin/2.10.x'.

You are currently cherry-picking commit 462f5d741.
  (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:   CMakeLists.txt
	modified:   examples/cpp/rtps/AsSocket/TestWriterSocket.cpp
	modified:   examples/cpp/rtps/Persistent/TestWriterPersistent.cpp
	modified:   examples/cpp/rtps/Registered/TestWriterRegistered.cpp
	modified:   include/fastdds/rtps/messages/CDRMessage.hpp
	modified:   src/cpp/dynamic-types/DynamicData.cpp
	modified:   src/cpp/fastdds/core/policy/ParameterSerializer.hpp
	modified:   src/cpp/utils/md5.cpp
	modified:   test/blackbox/common/BlackboxTestsDiscovery.cpp
	modified:   test/unittest/security/cryptography/CryptographyPluginTests.hpp
	modified:   test/unittest/xmlparser/XMLEndpointParserTests.cpp
	modified:   test/unittest/xmlparser/XMLParserTests.cpp
	modified:   test/unittest/xmlparser/XMLProfileParserTests.cpp
	modified:   thirdparty/boost/include/boost/intrusive/slist.hpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   test/unittest/xmlparser/XMLElementParserTests.cpp

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

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.com

[JLBuenoLopez]

@richiprosima please test this

[JLBuenoLopez]

@richiprosima please test mac

[JLBuenoLopez]

CI Mac failures are unrelated and the warnings are fixed.