[test_operator] Fix sync README script

Empty lists/dicts now display inline (e.g., []) instead of
redirecting to defaults file. Removed line number tracking and
anchors - links now point to main.yml file without #L123 fragments
for simpler navigation. This change was also done, so that when
adding a new parameter, users don't have to run the sync script
first to apply changes to the line numbers.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Signed-off-by: Katarina Strenkova <kstrenko@redhat.com>

Author: 2 people