gh/workflow: change multicluster provisioning to none blocking mode

Multicluster conformance tests set up two clusters in blocking mode
and sequentially. Every cluster provisioning takes 4 to 5 min.
This commit changes provisioning to none blocking mode and adds
a step to wait for provisioning to finish.

This change would cut the run time by 4 to 5 min.

Signed-off-by: Birol Bilgin <birol@cilium.io>

.github/workflows/conformance-multicluster-v1.11.yaml

@@ -243,7 +243,8 @@ jobs:
             --disk-type pd-standard \
             --disk-size 10GB \
             --node-taints node.cilium.io/agent-not-ready=true:NoExecute \
-            --preemptible
+            --preemptible \
+            --async
 
       - name: Create GKE cluster 2
         run: |
@@ -259,7 +260,14 @@ jobs:
             --disk-type pd-standard \
             --disk-size 10GB \
             --node-taints node.cilium.io/agent-not-ready=true:NoExecute \
-            --preemptible
+            --preemptible \
+            --async
+
+      - name: Wait for clusters to be provisioned
+        run: |
+          while [ "$(gcloud container operations list --filter="status=RUNNING AND targetLink~${{ env.clusterNameBase }}" --format="value(name)")" ];do
+            echo "cluster has an ongoing operation, waiting for all operations to finish"; sleep 10
+          done
 
       - name: Allow cross-cluster traffic
         run: |

.github/workflows/conformance-multicluster-v1.12.yaml

@@ -243,7 +243,8 @@ jobs:
             --disk-type pd-standard \
             --disk-size 10GB \
             --node-taints node.cilium.io/agent-not-ready=true:NoExecute \
-            --preemptible
+            --preemptible \
+            --async
 
       - name: Create GKE cluster 2
         run: |
@@ -259,7 +260,14 @@ jobs:
             --disk-type pd-standard \
             --disk-size 10GB \
             --node-taints node.cilium.io/agent-not-ready=true:NoExecute \
-            --preemptible
+            --preemptible \
+            --async
+
+      - name: Wait for clusters to be provisioned
+        run: |
+          while [ "$(gcloud container operations list --filter="status=RUNNING AND targetLink~${{ env.clusterNameBase }}" --format="value(name)")" ];do
+            echo "cluster has an ongoing operation, waiting for all operations to finish"; sleep 10
+          done
 
       - name: Allow cross-cluster traffic
         run: |

.github/workflows/conformance-multicluster-v1.13.yaml

@@ -243,7 +243,8 @@ jobs:
             --disk-type pd-standard \
             --disk-size 10GB \
             --node-taints node.cilium.io/agent-not-ready=true:NoExecute \
-            --preemptible
+            --preemptible \
+            --async
 
       - name: Create GKE cluster 2
         run: |
@@ -259,7 +260,14 @@ jobs:
             --disk-type pd-standard \
             --disk-size 10GB \
             --node-taints node.cilium.io/agent-not-ready=true:NoExecute \
-            --preemptible
+            --preemptible \
+            --async
+
+      - name: Wait for clusters to be provisioned
+        run: |
+          while [ "$(gcloud container operations list --filter="status=RUNNING AND targetLink~${{ env.clusterNameBase }}" --format="value(name)")" ];do
+            echo "cluster has an ongoing operation, waiting for all operations to finish"; sleep 10
+          done
 
       - name: Allow cross-cluster traffic
         run: |