Add workflows for tracks support (#272)

* Add workflows for tracks support

* Use pg 14/stable

.github/workflows/comment_contributing.yaml

@@ -0,0 +1,13 @@
+name: Comment on the pull request
+
+on:
+  pull_request:
+    types:
+      - opened
+    branches:
+      - 'track/**'
+
+jobs:
+  comment-on-pr:
+    uses: canonical/operator-workflows/.github/workflows/comment_contributing.yaml@main
+    secrets: inherit

.github/workflows/publish_charm.yaml

@@ -1,21 +1,12 @@
 name: Publish to edge
 
-# On push to a "special" branch, we:
-# * always publish to charmhub at latest/edge/branchname
-# * always run tests
-# where a "special" branch is one of main/master or track/**, as
-# by convention these branches are the source for a corresponding
-# charmhub edge channel.
-
 on:
-  workflow_dispatch:
   push:
     branches:
       - main
+      - track/*
 
 jobs:
   publish-to-edge:
     uses: canonical/operator-workflows/.github/workflows/publish_charm.yaml@main
     secrets: inherit
-    with:
-     channel: latest/edge

tests/integration/conftest.py

@@ -149,7 +149,7 @@ async def app_fixture(
 
     postgres_app = await model.deploy(
         "postgresql-k8s",
-        channel="14/edge",
+        channel="14/stable",
         series="jammy",
         trust=True,
         config={"profile": "testing"},