fix: Ensure COMMON_TASK_VALIDATIONS_EXCLUDES_REGEXP works for shfmt

mentioned in commit 4bc8e6c1

mentioned in merge request gitlab-com/runbooks!5350 (merged)

mentioned in merge request common-ci-tasks-images!60 (merged)

mentioned in merge request gitlab-org/release-tools!2155 (merged)

mentioned in merge request third-party-container-images!34 (merged)

mentioned in merge request fluentd-docker!38 (merged)

mentioned in merge request es-diagnostics!15

mentioned in merge request gitlab-com/gl-infra/k8s-workloads/common!248 (merged)

mentioned in merge request slackline!144 (merged)

mentioned in merge request cmbr!149 (merged)

mentioned in merge request pmv!221 (merged)

mentioned in merge request bigquery-loader!72 (merged)

mentioned in merge request terra-transformer!203 (merged)

mentioned in merge request asdf-gl-infra!27 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!2 (merged)

mentioned in merge request gcp-quota-exporter!2 (merged)

mentioned in merge request es-diagnostics!18