[15611] Improve GUID_t operator< performance (backport #2955)

[mergify]

This is an automatic backport of pull request #2955 done by Mergify.
Cherry-pick of c871a29 has failed:

On branch mergify/bp/2.3.x/pr-2955
Your branch is up to date with 'origin/2.3.x'.

You are currently cherry-picking commit c871a2956.
  (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:   include/fastdds/rtps/common/Guid.h
	modified:   include/fastdds/rtps/common/GuidPrefix_t.hpp
	new file:   test/unittest/rtps/common/EntityIdTests.cpp
	new file:   test/unittest/rtps/common/GuidPrefixTests.cpp
	new file:   test/unittest/rtps/common/GuidTests.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   include/fastdds/rtps/common/EntityId_t.hpp
	both modified:   test/unittest/rtps/common/CMakeLists.txt

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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[MiguelCompany]

@jparisu Would you mind solving conflicts here ?

[MiguelCompany]

@richiprosima Please test this

[MiguelCompany]

@richiprosima Please test mac