[20739] Refactor IStatusQueryable and make monitor service interfaces private (backport #4651)

[mergify]

Description

This PR brings to master the work from #4640 commit a2f4664 and 7a0c328. It refactors the IStatusQueryable() interface and make monitor service interfaces private (except from IProxyQueryable.hpp as PDP.h is still public in master and implements it).

@Mergifyio backport 2.13.x

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• N/A 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
• N/A Any new/modified methods have been properly documented using Doxygen.
• Changes are ABI compatible.
• 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.
  Related documentation PR: [20739] Remove ddsentitystatus from docs Fast-DDS-docs#745
• 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.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

---

This is an automatic backport of pull request #4651 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of fb841b9 has failed:

On branch mergify/bp/2.13.x/pr-4651
Your branch is up to date with 'origin/2.13.x'.

You are currently cherry-picking commit fb841b9a1.
  (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/builtin/discovery/participant/PDP.h
	modified:   include/fastdds/statistics/monitorservice_types.idl
	new file:   include/fastdds/statistics/rtps/monitor_service/connections_fwd.hpp
	modified:   src/cpp/fastdds/publisher/PublisherImpl.cpp
	modified:   src/cpp/fastdds/publisher/PublisherImpl.hpp
	modified:   src/cpp/fastdds/subscriber/SubscriberImpl.cpp
	modified:   src/cpp/fastdds/subscriber/SubscriberImpl.hpp
	modified:   src/cpp/rtps/builtin/discovery/endpoint/EDP.cpp
	modified:   src/cpp/rtps/builtin/discovery/endpoint/EDPSimple.cpp
	modified:   src/cpp/rtps/builtin/discovery/participant/PDPListener.cpp
	modified:   src/cpp/rtps/participant/RTPSParticipantImpl.h
	modified:   src/cpp/statistics/fastdds/domain/DomainParticipantImpl.cpp
	modified:   src/cpp/statistics/fastdds/domain/DomainParticipantImpl.hpp
	renamed:    include/fastdds/statistics/rtps/monitor_service/Interfaces.hpp -> src/cpp/statistics/rtps/monitor-service/Interfaces.hpp
	modified:   src/cpp/statistics/rtps/monitor-service/MonitorService.cpp
	modified:   src/cpp/statistics/rtps/monitor-service/MonitorService.hpp
	modified:   src/cpp/statistics/rtps/monitor-service/MonitorServiceListener.hpp
	renamed:    include/fastdds/statistics/rtps/monitor_service/interfaces/IConnectionsObserver.hpp -> src/cpp/statistics/rtps/monitor-service/interfaces/IConnectionsObserver.hpp
	renamed:    include/fastdds/statistics/rtps/monitor_service/interfaces/IConnectionsQueryable.hpp -> src/cpp/statistics/rtps/monitor-service/interfaces/IConnectionsQueryable.hpp
	renamed:    include/fastdds/statistics/rtps/monitor_service/interfaces/IProxyObserver.hpp -> src/cpp/statistics/rtps/monitor-service/interfaces/IProxyObserver.hpp
	renamed:    include/fastdds/statistics/rtps/monitor_service/interfaces/IStatusObserver.hpp -> src/cpp/statistics/rtps/monitor-service/interfaces/IStatusObserver.hpp
	renamed:    include/fastdds/statistics/rtps/monitor_service/interfaces/IStatusQueryable.hpp -> src/cpp/statistics/rtps/monitor-service/interfaces/IStatusQueryable.hpp
	modified:   test/mock/rtps/PDP/fastdds/rtps/builtin/discovery/participant/PDP.h
	modified:   test/mock/rtps/RTPSParticipant/fastdds/rtps/participant/RTPSParticipant.h
	modified:   test/unittest/statistics/dds/StatisticsDomainParticipantStatusQueryableTests.cpp
	modified:   test/unittest/statistics/rtps/MonitorServiceTests.cpp
	modified:   test/unittest/statistics/rtps/RTPSStatisticsTests.cpp
	modified:   test/unittest/statistics/rtps/mock/StatisticsBase/statistics/rtps/monitor-service/MonitorService.hpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   include/fastdds/rtps/reader/RTPSReader.h
	both modified:   include/fastdds/rtps/writer/RTPSWriter.h

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

[JesusPoderoso]

@richiprosima please test this

[JesusPoderoso]

LGTM with green CI

[JesusPoderoso]

CI issues are unrelated to the PR content
(Manual run with correct branches passed here)
Ready to merge!