ci: decrease CPU cores to 4 and increase memory to 16Gi

.gitlab-ci.yml

@@ -7,10 +7,10 @@ stages:
 .jobs-resource-allocation:
   variables:
     # Sized resources using https://app.datadoghq.com/dashboard/xff-wqx-4a2/ci-reliability-kubernetes-runner-sizing-and-diagnotic
-    KUBERNETES_CPU_REQUEST: "6"
-    KUBERNETES_CPU_LIMIT: "6"
-    KUBERNETES_MEMORY_REQUEST: "12Gi"
-    KUBERNETES_MEMORY_LIMIT: "12Gi"
+    KUBERNETES_CPU_REQUEST: "4"
+    KUBERNETES_CPU_LIMIT: "4"
+    KUBERNETES_MEMORY_REQUEST: "16Gi"
+    KUBERNETES_MEMORY_LIMIT: "16Gi"
     # Using non-integer CPU requests/limits to avoid the static CPU policy to be set on the helper container.
     # Static CPU policy reserves full CPU cores for containers with integer requests. It is used to isolate
     # CI job containers from each other and prevent noisy ones to starve resources on a CI node.