[20119] TCP socket send buffer limit (backport #646)

[mergify]

This is an automatic backport of pull request #646 done by Mergify.
Cherry-pick of b74412f has failed:

On branch mergify/bp/2.12.x/pr-646
Your branch is up to date with 'origin/2.12.x'.

You are currently cherry-picking commit b74412f.
  (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/transport/tcp/tcp.rst

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   docs/fastdds/rtps_layer/rtps_layer.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

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[elianalf]

• Merge after [20119] TCP socket send buffer limit (backport #4237) Fast-DDS#4327