Fix CICD docker image rate limits. (#20304)

The docker image used in CICD was referencing `registry.k8s.io/pause:3.3`,
which appears to no longer function correctly. This commit swaps over to a
Hashicorp mirrored image that shouldn't have rate limits or disappearing
images.

test/integration/consul-container/libs/cluster/container.go

@@ -608,7 +608,7 @@ func startContainer(ctx context.Context, req testcontainers.ContainerRequest) (t
 	})
 }
 
-const pauseImage = "registry.k8s.io/pause:3.3"
+const pauseImage = "hashiderek/pause"
 
 type containerOpts struct {
 	configFile        string

testing/deployer/sprawl/internal/tfgen/gen.go

@@ -251,7 +251,7 @@ func (g *Generator) Generate(step Step) error {
 		addVolume(c.TLSVolumeName)
 	}
 
-	addImage("pause", "registry.k8s.io/pause:3.3")
+	addImage("pause", "hashiderek/pause")
 
 	if step.StartServers() {
 		for _, c := range g.topology.SortedClusters() {