iox-#1287 Fix CMake install paths

[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. Assign PR to reviewer

Notes for Reviewer

• Avoid duplicate installation of iceoryx_posh without /iceoryx/v2.90.0/

$ tree build/install/prefix/ -L 2
.
├── bin
├── etc
├── include
│   ├── iceoryx
│   │   └── v2.90.0
│   └── iceoryx_posh # This is the duplication, already contained in the folder above
├── lib
└── share
    └── doc

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 Setting RPATH for iceoryx artifacts #1287

[codecov]

Codecov Report

Merging #1385 (9624b70) into master (6a11ba3) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1385      +/-   ##
==========================================
- Coverage   78.81%   78.79%   -0.03%     
==========================================
  Files         375      375              
  Lines       14555    14555              
  Branches     2030     2030              
==========================================
- Hits        11472    11469       -3     
- Misses       2425     2426       +1     
- Partials      658      660       +2     

Flag	Coverage Δ
unittests	78.46% <ø> (-0.03%)	⬇️
unittests_timing	14.71% <ø> (ø)

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

Impacted Files	Coverage Δ
iceoryx_hoofs/source/concurrent/loffli.cpp	85.71% <0.00%> (-5.72%)	⬇️
...e/iceoryx_hoofs/internal/concurrent/smart_lock.inl	92.45% <0.00%> (-1.89%)	⬇️