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

This is an automatic backport of pull request #4237 done by Mergify. Cherry-pick of b5f8c8adcd06c42e25d2f8baeb5f00572588b16e has failed:

On branch mergify/bp/2.6.x/pr-4237
Your branch is up to date with 'origin/2.6.x'.

You are currently cherry-picking commit b5f8c8adc.
  (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:   src/cpp/rtps/attributes/RTPSParticipantAttributes.cpp
	modified:   src/cpp/rtps/transport/TCPChannelResource.cpp
	modified:   src/cpp/rtps/transport/TCPChannelResource.h
	modified:   src/cpp/rtps/transport/TCPChannelResourceBasic.cpp
	modified:   src/cpp/rtps/transport/TCPChannelResourceSecure.cpp

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   src/cpp/rtps/transport/TCPTransportInterface.cpp
	both modified:   src/cpp/rtps/transport/TCPTransportInterface.h
	both modified:   test/unittest/transport/TCPv4Tests.cpp
	both modified:   test/unittest/transport/TCPv6Tests.cpp
	both modified:   test/unittest/transport/mock/MockTCPv4Transport.h
	deleted by us:   test/unittest/transport/mock/MockTCPv6Transport.h
	both modified:   versions.md

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

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