Skip Helm test hook resources by default

[lblackstone]

Proposed changes

Many Helm charts include test hooks that can be
used by the "helm test" command to validate an
installation, but should not be included as part of
a default chart installation. This change disables
the creation of test resources by default, and includes
a new Chart parameter that can be used to override
this default and install the test resources.

Related issues (optional)

Related to #665

[lblackstone]

@jaxxstorm I wanted to make sure that this change makes sense to you as a user. We previously started implementing this change in #666

Here's a before and after example:

     Type                                            Name                                 Plan       Info
 +   pulumi:pulumi:Stack                             pulumi-k8s-test-pulumi-k8s-test-dev  create
 +   ├─ kubernetes:helm.sh/v3:Chart                  wordpress                            create
 +   │  ├─ kubernetes:core/v1:Secret                 wordpress                            create
 +   │  ├─ kubernetes:core/v1:PersistentVolumeClaim  wordpress                            create
 +   │  ├─ kubernetes:core/v1:Secret                 default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:Service                default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:ConfigMap              default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:Pod                    wordpress-credentials-test           create     1 warning
 +   │  ├─ kubernetes:core/v1:Service                wordpress                            create
 +   │  ├─ kubernetes:core/v1:ServiceAccount         default/wordpress-mariadb            create
 +   │  ├─ kubernetes:apps/v1:StatefulSet            default/wordpress-mariadb            create
 +   │  └─ kubernetes:apps/v1:Deployment             wordpress                            create
 +   └─ pulumi:providers:kubernetes                  foo                                  create

Diagnostics:
  kubernetes:core/v1:Pod (wordpress-credentials-test):
    warning: This resource contains Helm hooks that are not currently supported by Pulumi. The resource will be created, but any hooks will not be executed. Hooks support is tracked at https://github.com/pulumi/pulumi-kubernetes/issues/555

$ pulumi up
Previewing update (pulumi-k8s-test-dev)

     Type                                            Name                                 Plan
 +   pulumi:pulumi:Stack                             pulumi-k8s-test-pulumi-k8s-test-dev  create
 +   ├─ kubernetes:helm.sh/v3:Chart                  wordpress                            create
 +   │  ├─ kubernetes:core/v1:PersistentVolumeClaim  wordpress                            create
 +   │  ├─ kubernetes:core/v1:Secret                 wordpress                            create
 +   │  ├─ kubernetes:core/v1:ConfigMap              default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:ServiceAccount         default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:Secret                 default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:Service                default/wordpress-mariadb            create
 +   │  ├─ kubernetes:core/v1:Service                wordpress                            create
 +   │  ├─ kubernetes:apps/v1:Deployment             wordpress                            create
 +   │  └─ kubernetes:apps/v1:StatefulSet            default/wordpress-mariadb            create
 +   └─ pulumi:providers:kubernetes                  foo                                  create

[viveklak]

Looks good. The PR description mentioned something about a parameter to disable skipping of the installation but didn't see it in the PR? Did you want to add that separately?

Update - Ah its a draft. Nevermind :)