Improvement: fix change mgt findings

[aschemmel-tech]

Important

Make sure to link this issue with the PR for your improvement.

Deviation_17: The Impact Analysis on Element Level is not defined by the process definition. It shall be identified which ISO 26262 work products are affected by the change.

Deviation_18: To define that the committer is a competent person because he got training for 16h or got any training by a Safety Person will not guarantee an adequate level of safety knowledge to fulfill the responsibilities. Several years of professional safety projects experience with evidence shall be required.