Iox #1516 support for gtest vendor package

[dkroenke]

Pre-Review Checklist for the PR Author

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

Notes for Reviewer

Checklist for the PR Reviewer

• [x] Commits are properly organized and messages are according to the guideline
• [x] 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
• [x] Public API changes are documented via doxygen
• [ ] Copyright owner are updated in the changed files
• [x] PR title describes the changes

Post-review Checklist for the PR Author

1. [ ] All open points are addressed and tracked via issues

References

• Closes TBD

[mossmaurice]

@dkroenke Could you please link the PR to an issue under "References? Have you checked the ROS CI? Where can I find the latest build log?

[codecov[bot]]

Codecov Report

Merging #1523 (42b5486) into master (baeace3) will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1523      +/-   ##
==========================================
- Coverage   78.91%   78.90%   -0.02%     
==========================================
  Files         379      379              
  Lines       14486    14486              
  Branches     2028     2028              
==========================================
- Hits        11432    11430       -2     
- Misses       2428     2429       +1     
- Partials      626      627       +1     

Flag	Coverage Δ
unittests	78.56% <ø> (-0.02%)	:arrow_down:
unittests_timing	14.89% <ø> (ø)

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

Impacted Files	Coverage Δ
iceoryx_posh/source/mepoo/shared_chunk.cpp	93.33% <0.00%> (-3.34%)	:arrow_down:
.../include/iceoryx_hoofs/design_pattern/creation.hpp	100.00% <0.00%> (ø)