Release failure visibility (#42572)

Closes #ISSUE

Release Notes:

- N/A

.github/workflows/after_release.yml

@@ -86,3 +86,19 @@ jobs:
         SENTRY_ORG: zed-dev
         SENTRY_PROJECT: zed
         SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
+  notify_on_failure:
+    needs:
+    - rebuild_releases_page
+    - post_to_discord
+    - publish_winget
+    - create_sentry_release
+    if: failure()
+    runs-on: namespace-profile-2x4-ubuntu-2404
+    steps:
+    - name: release::notify_on_failure::notify_slack
+      run: |-
+        curl -X POST -H 'Content-type: application/json'\
+         --data '{"text":"${{ github.workflow }} failed:  ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"}' "$SLACK_WEBHOOK"
+      shell: bash -euxo pipefail {0}
+      env:
+        SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_WORKFLOW_FAILURES }}

.github/workflows/release.yml

@@ -477,6 +477,20 @@ jobs:
       shell: bash -euxo pipefail {0}
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  notify_on_failure:
+    needs:
+    - upload_release_assets
+    - auto_release_preview
+    if: failure()
+    runs-on: namespace-profile-2x4-ubuntu-2404
+    steps:
+    - name: release::notify_on_failure::notify_slack
+      run: |-
+        curl -X POST -H 'Content-type: application/json'\
+         --data '{"text":"${{ github.workflow }} failed:  ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"}' "$SLACK_WEBHOOK"
+      shell: bash -euxo pipefail {0}
+      env:
+        SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_WORKFLOW_FAILURES }}
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.ref_name == 'main' && github.sha || 'anysha' }}
   cancel-in-progress: true

.github/workflows/release_nightly.yml

@@ -490,3 +490,21 @@ jobs:
         SENTRY_PROJECT: zed
         SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
     timeout-minutes: 60
+  notify_on_failure:
+    needs:
+    - bundle_linux_aarch64
+    - bundle_linux_x86_64
+    - bundle_mac_aarch64
+    - bundle_mac_x86_64
+    - bundle_windows_aarch64
+    - bundle_windows_x86_64
+    if: failure()
+    runs-on: namespace-profile-2x4-ubuntu-2404
+    steps:
+    - name: release::notify_on_failure::notify_slack
+      run: |-
+        curl -X POST -H 'Content-type: application/json'\
+         --data '{"text":"${{ github.workflow }} failed:  ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"}' "$SLACK_WEBHOOK"
+      shell: bash -euxo pipefail {0}
+      env:
+        SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_WORKFLOW_FAILURES }}