fixes.py: Collect Omitted-fix tags also from the commit messages

Alexandra Hájkovárequested to merge
ahajkova/kernel-workflow:977 into main

The code was only checking for Omitted-fix tags in the MR description, not in individual commit messages. Now it collects Omitted-fix tags from both the MR description and and commit messages.

Fixes: KMAINT-977 Signed-off-by: Alexandra Hájková ahajkova@redhat.com

Edited by Alexandra Hájková

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