iox-#590 Move unused and quality level 2 classes to separate packages

[mossmaurice]

Pre-Review Checklist for the PR Author

1. Code follows the coding style of CONTRIBUTING.md
2. Tests follow the best practice for testing
3. Changelog updated in the unreleased section including API breaking changes
4. Branch follows the naming format (iox-123-this-is-a-branch)
5. Commits messages are according to this guideline
   • Commit messages have the issue ID (iox-#123 commit text)
   • Commit messages are signed (git commit -s)
   • Commit author matches Eclipse Contributor Agreement (and ECA is signed)
6. Update the PR title
   • Follow the same conventions as for commit messages
   • Link to the relevant issue
7. Relevant issues are linked
8. Add sensible notes for the reviewer
9. All checks have passed (except task-list-completed)
10. All touched (C/C++) source code files are added to ./clang-tidy-diff-scans.txt
11. Assign PR to reviewer

Notes for Reviewer

• Move unused files to separate repository in the iceoryx organisaton
• Move quality level 2 classes to new package iceoryx_dust (Deemed useful software thingies)

Checklist for the PR Reviewer

• Commits are properly organized and messages are according to the guideline
• Code according to our coding style and naming conventions
• Unit tests have been written for new behavior
• Public API changes are documented via doxygen
• Copyright owner are updated in the changed files
• All touched (C/C++) source code files have been added to ./clang-tidy-diff-scans.txt
• PR title describes the changes

Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

References

• Closes Improve modularity by creating architecure guidelines #590 (partly)

[codecov]

Codecov Report

Merging #1559 (e63815c) into master (70ec584) will decrease coverage by 3.84%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1559      +/-   ##
==========================================
- Coverage   78.95%   75.10%   -3.85%     
==========================================
  Files         379      369      -10     
  Lines       14486    14224     -262     
  Branches     2028     1988      -40     
==========================================
- Hits        11437    10683     -754     
- Misses       2421     2952     +531     
+ Partials      628      589      -39     

Flag	Coverage Δ
unittests	74.76% <ø> (-3.86%)	⬇️
unittests_timing	15.17% <ø> (+0.28%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
iceoryx_dds/source/gateway/main.cpp	0.00% <ø> (ø)
...oryx_dust/include/iceoryx_dust/cxx/file_reader.hpp	100.00% <ø> (ø)
...eoryx_dust/include/iceoryx_dust/cxx/objectpool.hpp	24.84% <ø> (ø)
...include/iceoryx_dust/internal/cxx/forward_list.inl	0.00% <ø> (ø)
.../include/iceoryx_dust/posix_wrapper/named_pipe.hpp	0.00% <ø> (ø)
...lude/iceoryx_dust/posix_wrapper/signal_watcher.hpp	0.00% <ø> (ø)
...eoryx_dust/relocatable_pointer/relocatable_ptr.inl	0.00% <ø> (ø)
iceoryx_dust/source/cxx/file_reader.cpp	38.09% <ø> (ø)
...ceoryx_dust/source/posix_wrapper/message_queue.cpp	0.00% <ø> (ø)
iceoryx_dust/source/posix_wrapper/named_pipe.cpp	0.00% <ø> (ø)
... and 21 more

[elBoberido]

Looks good. Just minor things