fix: updated signature collection failures to be treated as warnings

mentioned in commit 808f1460

mentioned in commit 29845304

mentioned in merge request hoppr/plugins/hoppr-nexus-bundler!278 (closed)

mentioned in merge request hoppr/plugins/starter-plugin!10 (merged)

mentioned in merge request hoppr/plugins/hoppr-git-bundle-collector-plugin!7 (closed)

mentioned in merge request hoppr/plugins/hoppr-jq-filter-plugin!23 (merged)

mentioned in merge request choppr!2 (closed)

mentioned in commit 59b4a806

mentioned in commit 16197b94

mentioned in merge request hoppr-cop!1032 (merged)

mentioned in merge request hoppr/plugins/hoppr-openssf-scorecard-plugin!204 (merged)