[#508] event concept based on socketpair

[elfenpiff]

Notes for Reviewer

Implemented the process local variant of events using socketpairs. Required - otherwise we do not have a real process local event variant, currently we use unix domain sockets with a file representation.

Windows required also a dup implementation on the platform since the notifier socket is acquired by duplicating one of the sockets from the socket pair since an event concept on that level is a M:1 connection (many notifiers and one listener) but a socketpair creates just 2 sockets.

Pre-Review Checklist for the PR Author

• Add sensible notes for the reviewer
• PR title is short, expressive and meaningful
• Consider switching the PR to a draft (Convert to draft)
  • as draft PR, the CI will be skipped for pushes
• Relevant issues are linked in the References section
• Every source code file has a copyright header with SPDX-License-Identifier: Apache-2.0 OR MIT
• Branch follows the naming format (iox2-123-introduce-posix-ipc-example)
• 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)
• Tests follow the best practice for testing
• Changelog updated in the unreleased section including API breaking changes
• Assign PR to reviewer
• 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

• All open points are addressed and tracked via issues

References

Relates to #508

[codecov]

Codecov Report

Attention: Patch coverage is 79.47977% with 71 lines in your changes missing coverage. Please review.

Project coverage is 78.86%. Comparing base (dd42fc9) to head (1b30800).

Files with missing lines	Patch %	Lines
iceoryx2-cal/src/event/process_local_socketpair.rs	82.93%	50 Missing ⚠️
iceoryx2-bb/posix/src/socket_pair.rs	65.00%	14 Missing ⚠️
iceoryx2-cal/src/dynamic_storage/process_local.rs	60.00%	4 Missing ⚠️
iceoryx2/src/port/notifier.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #598      +/-   ##
==========================================
+ Coverage   78.77%   78.86%   +0.08%     
==========================================
  Files         199      200       +1     
  Lines       24118    24443     +325     
==========================================
+ Hits        18999    19276     +277     
- Misses       5119     5167      +48     

Files with missing lines	Coverage Δ
iceoryx2-cal/src/event/mod.rs	44.44% <ø> (ø)
iceoryx2/src/port/notifier.rs	88.14% <0.00%> (-1.06%)	⬇️
iceoryx2-cal/src/dynamic_storage/process_local.rs	93.06% <60.00%> (-1.01%)	⬇️
iceoryx2-bb/posix/src/socket_pair.rs	67.13% <65.00%> (-0.45%)	⬇️
iceoryx2-cal/src/event/process_local_socketpair.rs	82.93% <82.93%> (ø)

... and 10 files with indirect coverage changes

[elBoberido]

Looks good. No obvious reason why the Windows CI fails.

I guess you need to add iceoryx2_bb_log to the iceoryx2-cal-tests bazel target.