ci/bin: Fix gitlab_gql methods that uses needs DAG

Some gitlab_gql.py features like `--print-dag` were affected by recent
changes. Update those functions with the refactored data.

Fixes: c7b67d8619
Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25940>

bin/ci/pipeline_utils.gql

@@ -0,0 +1,9 @@
+query sha2pipelineIID($projectPath: ID!, $sha: String!) {
+  project(fullPath: $projectPath) {
+    pipelines(last: 1, sha:$sha){
+      nodes {
+        iid
+      }
+    }
+  }
+}