Only notify on nightly builds

Signed-off-by: Pedro Algarvio <palgarvio@vmware.com>

.github/workflows/staging.yml

@@ -2736,27 +2736,6 @@ jobs:
         id: get-workflow-info
         uses: technote-space/workflow-conclusion-action@v3
 
-      - name: Notify Slack
-        id: slack
-        uses: slackapi/slack-github-action@v1.24.0
-        with:
-          payload: |
-            {
-              "text": "Nightly Workflow build result: ${{ job.status }}\n${{ github.event.head_commit.url }}",
-              "blocks": [
-                {
-                  "type": "section",
-                  "text": {
-                    "type": "mrkdwn",
-                    "text": "GitHub Action build result: ${{ job.status }}\n${{ github.event.head_commit.url }}"
-                  }
-                }
-              ]
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
-          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK
-
       - name: Set Pipeline Exit Status
         shell: bash
         run: |

.github/workflows/templates/nightly.yml.jinja

@@ -119,6 +119,8 @@ concurrency:
 
 <%- block set_pipeline_exit_status_extra_steps %>
 
+    <%- if workflow_slug == "nightly" %>
+
       - name: Notify Slack
         id: slack
         uses: slackapi/slack-github-action@v1.24.0
@@ -139,4 +141,7 @@ concurrency:
         env:
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
           SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK
+
+    <%- endif %>
+
 <%- endblock set_pipeline_exit_status_extra_steps %>