[#42] Add acl feature flag and deactive it by default

[elfenpiff]

Notes for Reviewer

Pre-Review Checklist for the PR Author

1. Add sensible notes for the reviewer
2. PR title is short, expressive and meaningful
3. Relevant issues are linked
4. Every source code file has a copyright header with SPDX-License-Identifier: Apache-2.0 OR MIT
5. Branch follows the naming format (iox2-123-introduce-posix-ipc-example)
6. Commits messages are according to this guideline
   • Commit messages have the issue ID ([#123] Add posix ipc example)
   • Commit author matches Eclipse Contributor Agreement (and ECA is signed)
7. Tests follow the best practice for testing
8. Changelog updated in the unreleased section including API breaking changes
9. Assign PR to reviewer
10. All checks have passed (except task-list-completed)

Checklist for the PR Reviewer

• Commits are properly organized and messages are according to the guideline
• Unit tests have been written for new behavior
• Public API is documented
• PR title describes the changes

Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

References

Use either 'Closes #123' or 'Relates to #123' to reference the corresponding issue.

Relates to #2

[codecov]

Codecov Report

Merging #43 (6d04921) into main (04e367f) will increase coverage by 0.12%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

❗ Current head 6d04921 differs from pull request most recent head 6ac8c70. Consider uploading reports for the commit 6ac8c70 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #43      +/-   ##
==========================================
+ Coverage   77.76%   77.88%   +0.12%     
==========================================
  Files         173      171       -2     
  Lines       19086    18638     -448     
==========================================
- Hits        14842    14516     -326     
+ Misses       4244     4122     -122     

Files	Coverage Δ
iceoryx2-bb/posix/src/directory.rs	62.18% <ø> (ø)
iceoryx2-bb/posix/src/file.rs	64.97% <ø> (ø)
iceoryx2-bb/posix/src/file_descriptor.rs	74.78% <ø> (-2.21%)	⬇️
iceoryx2-pal/posix/src/linux/types.rs	100.00% <ø> (ø)

... and 4 files with indirect coverage changes