Iox #341 improve waitset wait performance by returning TriggerInfo pointer

[elfenpiff]

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Notes for Reviewer

Info Please review: #435 first since this PR is based on that one.
To improve the performance of the wait call we reduced the element size from 48 byte to 8 bytes by returning a pointer to a TriggerInfo object instead of a copy.
To realize this we had to turn the TriggerVector inside of the waitset into a TriggerList.

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
• Public API changes are documented via doxygen
• Copyright owner are updated in the changed files
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Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

Post-review Checklist for the Eclipse Committer

1. All checkboxes in the PR checklist are checked or crossed out
2. Merge

References

• See Refactoring of waitset #341

[budrus]

Good job