ci: Update on_pull_request and on_push (#55)

Update CI to use changes from canonical/charmed-kubeflow-workflows#36. 

- Update on_pull_request 
- Add on_push workflow
- Disable scheduled build_and_scan since ATM it's not working and it's only polluting
GH actions tab. This is bound to be redesigned as part of canonical/bundle-kubeflow#782.

Ref canonical/charmed-kubeflow-workflows#31

.github/workflows/build_and_scan_rocks.yaml

@@ -1,12 +1,16 @@
 name: Build and scan ROCKs, save and send scan reports
 
 on:
-  schedule:
+  workflow_dispatch:
+  # Disable scheduling since ATM it's not working and this should be refactored
+  # be refactored as part of https://github.com/canonical/bundle-kubeflow/issues/782.
+  # Add `workflow_dispatch` since otherwise the workflow will be invalid.
+  # schedule:
   # every day at 1:12AM UTC
-  - cron: '12 1 * * *'
-    secrets:
-      CVE_REPORT_JIRA_URL:
-        required: true
+  # - cron: '12 1 * * *'
+  #   secrets:
+  #     CVE_REPORT_JIRA_URL:
+  #       required: true
 
 jobs:
   build-scan-rocks:

.github/workflows/on_pull_request.yaml

@@ -1,14 +1,17 @@
 name: On Pull Request
 
-# On pull_request, we:
-# * always build the rocks
-# * always run tests
-
 on:
   pull_request:
 
 jobs:
 
-  tests:
-    name: Run Tests
-    uses: ./.github/workflows/integrate.yaml
+  on-pull-request:
+    name: Get ROCKs modified and build-scan-test them
+    uses: canonical/charmed-kubeflow-workflows/.github/workflows/get-rocks-modified-and-build-scan-test-publish.yaml@main
+    permissions:
+      pull-requests: read
+    secrets: inherit
+    with:
+      microk8s-channel: 1.26/stable
+      juju-channel: 3.1/stable
+      python-version: "3.8"

.github/workflows/on_push.yaml

@@ -0,0 +1,20 @@
+name: On Push
+
+on:
+  push:
+    branches:
+    - main
+    - track/**
+
+jobs:
+
+  on-push:
+    name: Get ROCKs modified and build-scan-test-publish them
+    uses: canonical/charmed-kubeflow-workflows/.github/workflows/get-rocks-modified-and-build-scan-test-publish.yaml@main
+    permissions:
+      pull-requests: read
+    secrets: inherit
+    with:
+      microk8s-channel: 1.26/stable
+      juju-channel: 3.1/stable
+      python-version: "3.8"