chore(ci): fix gardener issues comment workflow (#17825)

As it was previously implemented, this workflow would add an issue to
the Gardener board if it wasn't already present. This updates the
graphql query to fetch the necessary project item id without creating
new items.

Tested the graphql query in the
[playground](https://docs.github.com/en/graphql/overview/explorer).
Tested the `jq` command locally. 
Example Issue ID: `I_kwDOCLjIc85p9V5j`

---------

Co-authored-by: Jesse Szwedko <jesse.szwedko@datadoghq.com>

.github/workflows/gardener_issue_comment.yml

@@ -26,44 +26,43 @@ jobs:
           status_field_id="PVTF_lADOAQFeYs4AAsTrzgAXRuU" # Status
           triage_option_id="2a08fafa"
 
-          # ensures that the issue is already on board but also seems to be the only way to fetch
-          # the item id
-          item_id="$(gh api graphql -f query='
-            mutation($project_id: ID!, $content_id: ID!) {
-                addProjectV2ItemById(input: {projectId: $project_id, contentId: $content_id}) {
-                  item {
-                    id
-                  }
-                }
-            }' -f project_id="$project_id" -f content_id="$issue_id" -q '.data.addProjectV2ItemById.item.id'
-          )"
-
-          echo "item_id: $item_id"
-
-          if [ -z "$item_id" ] ; then
-            echo "Issue not found in Gardener board"
-            exit 0
-          else
-            echo "Found issue on Gardener board"
-          fi
-
-          current_status="$(gh api graphql -f query='
+          # Query for project items for the given issue
+          project_items="$(gh api graphql -f query='
             query($item_id: ID!) {
               node(id: $item_id) {
-                ... on ProjectV2Item {
-                  fieldValueByName(name: "Status") {
-                    ... on ProjectV2ItemFieldSingleSelectValue {
-                      name
+                ... on Issue {
+                  projectItems(first: 50) {
+                    ... on ProjectV2ItemConnection {
+                      nodes {
+                        fieldValueByName(name: "Status") {
+                          ... on ProjectV2ItemFieldSingleSelectValue {
+                            name
+                          }
+                        }
+                        ... on ProjectV2Item {
+                          project {
+                            ... on ProjectV2 {
+                              id
+                            }
+                          }
+                        }
+                      }
                     }
                   }
                 }
               }
-            }' -f item_id="$item_id"
+            }' -f item_id="$issue_id"
           )"
 
-          current_status=$(echo $current_status | jq -c -r '.["data"]["node"]["fieldValueByName"]["name"]')
+          # Extract the item in the Gardener project
+          current_status=$(echo $project_items | jq -r '.data.node.projectItems.nodes[] | select(.project.id == $project_id) | .fieldValueByName.name')
 
-          echo "Current issue status is: '${current_status}'"
+          if [ -z "$current_status" ] ; then
+            echo "Issue not found in Gardener board"
+            exit 0
+          else
+            echo "Found issue on Gardener board. Current issue status is: '${current_status}'"
+          fi
 
           if [ "$current_status" = "Blocked / Waiting" ] ; then
             echo "Moving issue from 'Blocked / Waiting' to 'Triage'"