Add asyn-label workflows for PRs (#1489)

* Add asyn-label workflows for PRs

---------

Co-authored-by: Benedikt Volkel <benedikt.volkel@cern.ch>

Author: benedikt-voelkel

.github/workflows/async-auto-label.yml

@@ -0,0 +1,18 @@
+---
+name: Apply requested async label
+
+'on':
+  issue_comment:
+    types:
+      - created
+      - edited
+
+permissions:
+  pull-requests: write   # to update labels
+
+jobs:
+  apply_async_labels:
+    name: Apply requested async label
+    uses: alisw/ali-bot/.github/workflows/async-auto-label.yml@master
+    permissions:
+      pull-requests: write   # to update labels

.github/workflows/async-list-label.yml

@@ -0,0 +1,20 @@
+---
+name: Collect and print async labels
+
+'on':
+  pull_request:
+    types:
+      - opened
+      - reopened
+    branches:
+      - master
+
+permissions:
+  pull-requests: write   # to update labels
+
+jobs:
+  list_async_labels:
+    name: Collect and print async labels
+    uses: alisw/ali-bot/.github/workflows/async-list-label.yml@master
+    permissions:
+      pull-requests: write   # to update labels