Serialize baremetal e2e globally

Author: guettli

.github/workflows/e2e-basic-baremetal.yaml

@@ -30,7 +30,7 @@ jobs:
 
   e2e-hetzner-basic:
     name: Test Hetzner Basic
-    concurrency: ci-${{ github.ref }}-e2e-baremetal-hetzner
+    concurrency: ci-e2e-baremetal-global
     runs-on: ubuntu-latest
     permissions:
       # Required for hcloud TPS

.github/workflows/e2e-feature-baremetal.yaml

@@ -30,7 +30,7 @@ jobs:
 
   e2e-hetzner-baremetal-feature:
     name: Test Hetzner Baremetal Features
-    concurrency: ci-${{ github.ref }}-e2e-baremetal-hetzner
+    concurrency: ci-e2e-baremetal-global
     runs-on: ubuntu-latest
     permissions:
       # Required for hcloud TPS

.github/workflows/pr-e2e.yaml

@@ -69,7 +69,7 @@ jobs:
   e2e-hetzner-basic:
     name: Test Hetzner Baremetal Basic
     if: github.event_name != 'pull_request' || !github.event.pull_request.draft
-    concurrency: ci-${{ github.ref }}-e2e-basic-hetzner
+    concurrency: ci-e2e-baremetal-global
     runs-on: ubuntu-latest
     permissions:
       # Required for hcloud TPS