Update a redis image (#3917)

This is currently pointing at a v1 Docker manifest that's no longer
supported
on our GKS cluster:

> Failed to pull image "k8s.gcr.io/redis:e2e": Docker Image Format v1
> and Docker Image manifest version 2, schema 1 support has been
removed.
> Suggest the author of k8s.gcr.io/redis:e2e to upgrade the image to the
> OCI Format or Docker Image manifest v2, schema 2. More information at
> https://docs.docker.com/go/deprecated-image-specs/

This updates the image to one which is valid, and it fixes our failing
Dotnet test to no longer point at the contents of master.

Fixes #3904.

Author: blampe

tests/sdk/dotnet/dotnet_test.go

@@ -89,7 +89,7 @@ func TestDotnet_YamlUrl(t *testing.T) {
 			t *testing.T, stackInfo integration.RuntimeValidationStackInfo,
 		) {
 			assert.NotNil(t, stackInfo.Deployment)
-			assert.Equal(t, 18, len(stackInfo.Deployment.Resources))
+			assert.Equal(t, 8, len(stackInfo.Deployment.Resources))
 		},
 	})
 	integration.ProgramTest(t, &test)

tests/sdk/dotnet/yaml-url/Program.cs

@@ -36,7 +36,7 @@ private ConfigFile MakeConfigFile(string name, string namespaceName, Provider pr
     {
         return new ConfigFile(name, new ConfigFileArgs
         {
-            File = "https://raw.githubusercontent.com/pulumi/pulumi-kubernetes/master/tests/sdk/nodejs/examples/yaml-guestbook/yaml/guestbook.yaml",
+            File = "https://raw.githubusercontent.com/kubernetes/website/a7c0537de79165b4c33eebe2af8f263426e8408e/content/en/examples/application/guestbook/redis-leader-deployment.yaml",
             ResourcePrefix = resourcePrefix,
             Transformations =
             {

tests/sdk/nodejs/examples/yaml-guestbook/yaml/guestbook.yaml

@@ -35,7 +35,7 @@ spec:
     spec:
       containers:
       - name: master
-        image: k8s.gcr.io/redis:e2e  # or just image: redis
+        image: docker.io/redis:6.0.5
         resources:
           requests:
             cpu: 100m