iox-#337 remove posix timer

[FerdinandSpitzschnueffler]

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. Assign PR to reviewer

Notes for Reviewer

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
  • Each unit test case has a unique UUID
• Public API changes are documented via doxygen
• Copyright owner are updated in the changed files
• PR title describes the changes

Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

References

• Relates to Deprecate posix timer #337

[codecov]

Codecov Report

Merging #1376 (93ab230) into master (0477dfa) will increase coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1376      +/-   ##
==========================================
+ Coverage   78.71%   78.88%   +0.17%     
==========================================
  Files         376      374       -2     
  Lines       14777    14541     -236     
  Branches     2066     2028      -38     
==========================================
- Hits        11632    11471     -161     
+ Misses       2466     2411      -55     
+ Partials      679      659      -20     

Flag	Coverage Δ
unittests	78.55% <ø> (+0.60%)	⬆️
unittests_timing	14.73% <ø> (-0.74%)	⬇️

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

Impacted Files	Coverage Δ
iceoryx_posh/source/runtime/posh_runtime_impl.cpp	65.43% <0.00%> (-1.49%)	⬇️