ci: switch to on-prem ci (#637)

* ci: switch to on-prem ci

* ci: bump flavor size for keycloak tests
diff --git a/.github/workflows/ceph.yml b/.github/workflows/ceph.yml
index a8e0682..d0ba52d 100644
--- a/.github/workflows/ceph.yml
+++ b/.github/workflows/ceph.yml
@@ -37,7 +37,7 @@
 
 jobs:
   debug:
-    runs-on: ubuntu-20.04-16-cores
+    runs-on: v3-standard-16
     if: github.event_name == 'workflow_dispatch' && inputs.debug_enabled
     strategy:
       fail-fast: false
@@ -82,7 +82,7 @@
         run: poetry run molecule destroy -s ceph
 
   test:
-    runs-on: ubuntu-20.04-16-cores
+    runs-on: v3-standard-16
     if: github.event_name != 'workflow_dispatch' || !inputs.debug_enabled
     strategy:
       fail-fast: false
diff --git a/.github/workflows/keycloak.yml b/.github/workflows/keycloak.yml
index 86dad2e..676cf8e 100644
--- a/.github/workflows/keycloak.yml
+++ b/.github/workflows/keycloak.yml
@@ -22,7 +22,7 @@
 
 jobs:
   molecule:
-    runs-on: ubuntu-latest-4-cores
+    runs-on: v3-standard-8
     steps:
       - name: Checkout project
         uses: actions/checkout@v4