[CodeQL] Moved notification on failure to a separate step (elastic#218394)

## Summary

Moved notification on failure to a separate step.

Author: elena-shostak

.github/workflows/codeql.yml

@@ -60,15 +60,6 @@ jobs:
         category: "/language:${{matrix.language}}"
         ref: ${{ env.CHECKOUT_REF }}
         sha: ${{ env.CHECKOUT_SHA }}
-    - name: Notify to slack on failure
-      if: ${{ failure() }}
-      uses: slackapi/[email protected]
-      with:
-        method: chat.postMessage
-        token: ${{ secrets.CODE_SCANNING_SLACK_TOKEN }}
-        payload: |
-          channel: ${{ secrets.CODE_SCANNING_SLACK_CHANNEL_ID }}
-          text: ":broken_heart: CodeQL analysis failed for ${{ github.repository }} on ${{ env.CHECKOUT_SHA }}."
   alert:
     name: Alert
     runs-on: ubuntu-latest
@@ -94,3 +85,39 @@ jobs:
       run: |
         npm ci --omit=dev
         node codeql-alert
+  notify_on_failure:
+    name: Failure notification
+    runs-on: ubuntu-latest
+    needs: analyze
+    if: failure()
+    steps:
+      - name: Send notification to slack
+        uses: slackapi/[email protected]
+        with:
+          method: chat.postMessage
+          token: ${{ secrets.CODE_SCANNING_SLACK_TOKEN }}
+          payload: |
+            channel: ${{ secrets.CODE_SCANNING_SLACK_CHANNEL_ID }}
+            "blocks": [
+            	{
+                "type": "section",
+                "text": {
+                  "type": "mrkdwn",
+                  "text": ":broken_heart: CodeQL analysis failed for ${{ github.repository }}."
+                }
+              },
+              {
+                "type": "actions",
+                "elements": [
+                  {
+                    "type": "button",
+                    "text": {
+                      "type": "plain_text",
+                      "text": "View Workflow Run"
+                    },
+                    "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+                  }
+                ]
+              }
+            ]
+