reduce e2e worker sizing (#1734)

The microvm demo is unnecessarily upsized vs the gvisor counter demo,
and we create larger pools than we need.

CI is relatively tight on resources, and over-sizing uVM actors also
costs boot time, snapshot size etc.

demos/counter/counter-microvm-template.yaml.tmpl

@@ -55,7 +55,7 @@ containers:
 resources:
   limits:
   - name: cpu
-    quantity: "2"
+    quantity: "1"
   - name: memory
     quantity: 512Mi
 snapshotsConfig:

demos/counter/counter-microvm.yaml.tmpl

@@ -58,8 +58,8 @@ spec:
     # limit: the guest RAM plus the VMM reserve has to be really there.
     resources:
       limits:
-        cpu: "2"
-        memory: 2Gi
+        cpu: "1"
+        memory: 1Gi
       requests:
-        cpu: 500m
-        memory: 2Gi
+        cpu: 250m
+        memory: 1Gi

internal/e2e/suites/demo/demo_test.go

@@ -1067,10 +1067,11 @@ func createActorTemplateInternal(ctx context.Context, t *testing.T, clients *e2e
 	// template names unique.
 	name := base + "-" + nsObj.Name
 	at := e2e.CreateSubstrateCounterTemplate(ctx, t, clients, nsObj.Name, e2e.SubstrateTemplateOptions{
-		Atespace:     demoAtespace,
-		Name:         name,
-		PoolName:     base,
-		PoolReplicas: 5,
+		Atespace: demoAtespace,
+		Name:     name,
+		PoolName: base,
+		// One actor at a time, plus a spare for the worker-deletion tests.
+		PoolReplicas: 2,
 		Labels:       map[string]string{"demo": nsObj.Name},
 		SnapshotsConfig: &ateapipb.SnapshotsConfig{
 			StorageLocation: "gs://" + env["BUCKET_NAME"] + "/ate-demo-" + name,