Run CI on self-hosted runners

.github/workflows/integration.yaml

@@ -15,7 +15,7 @@ jobs:
     uses: canonical/data-platform-workflows/.github/workflows/build_rock.yaml@v16
 
   integration:
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, X64, jammy, large]
     timeout-minutes: 120
     needs: build
     strategy:
@@ -31,23 +31,29 @@ jobs:
           provider: microk8s
           channel: "1.29-strict/stable"
           bootstrap-constraints: "cores=2 mem=2G"
-          juju-channel: 3.1/stable
+          juju-channel: 3.4/stable
           # This is needed until
           # https://bugs.launchpad.net/juju/+bug/1977582 is fixed
-          bootstrap-options: "--agent-version 3.1.7"
+          bootstrap-options: "--agent-version 3.4.4"
       - name: Install rockcraft
         run: |
-          sudo snap install rockcraft --classic --revision 1206
-          sudo snap refresh rockcraft --hold=forever
+          sudo snap install rockcraft --classic
       - name: Download rock package(s)
         uses: actions/download-artifact@v4
         with:
           pattern: ${{ needs.build.outputs.artifact-prefix }}-*
           merge-multiple: true
       - name: Install tox & poetry
         run: |
+          sudo apt-get update
+          sudo apt-get install python3-pip python3-venv -y --no-install-recommends
+          python3 -m pip install --user pipx
+          python3 -m pipx ensurepath
           pipx install tox
           pipx install poetry
+          pipx install charmcraftcache
+          pipx inject poetry poetry-plugin-export
+          poetry config warnings.export false
       - name: Integration Tests
         run: |
           sg snap_microk8s -c "tox -e ${{ matrix.env }}"

.github/workflows/lint.yaml

@@ -11,7 +11,7 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, X64, jammy, large]
     timeout-minutes: 5
     steps:
       - name: Checkout repository

.github/workflows/publish.yaml

@@ -21,7 +21,7 @@ jobs:
   publish:
     needs: build
     name: publish
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, X64, jammy, large]
     timeout-minutes: 15
     steps:
       - name: Checkout repo

.github/workflows/publish_beta.yaml

@@ -6,7 +6,7 @@ jobs:
     uses: ./.github/workflows/build.yaml
   publish:
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, linux, X64, jammy, large]
     timeout-minutes: 5
     permissions:
       packages: write