Add --output flag in clustersupplychain list/get

[warango4]

Description of problem

Proposed solution

Given I have some supply chains in my cluster
When I run `tanzu apps csc get my-suppply-chain --output yaml` or `tanzu apps csc list --output yaml` 
Then I get the output of the supply chain in yaml format

Given I have some supply chains in my cluster
When I run `tanzu apps csc get my-suppply-chain --output json` or `tanzu apps csc list --output json` 
Then I get the output of the supply chain in json format

Example

tanzu apps csc get basic-image-to-url -oyaml

apiVersion: carto.run/v1alpha1
kind: ClusterSupplyChain
metadata:
...
  name: basic-image-to-url
  resourceVersion: "1711559"
  uid: 60a044c7-0af3-4a2e-847b-bdf40f690d9a
spec:
  params:
  - default: main
    name: gitops_branch
  - default: supplychain
    name: gitops_user_name
  - default: supplychain
    name: gitops_user_email
  - default: supplychain@cluster.local
    name: gitops_commit_message
  - default: ""
    name: gitops_ssh_secret
  resources:
 ...
  - configs:
    - name: config
      resource: config-provider
    name: app-config
    templateRef:
      kind: ClusterConfigTemplate
      options:
      - name: config-template
        selector:
          matchLabels:
            apps.tanzu.vmware.com/workload-type: web
      - name: server-template
        selector:
          matchLabels:
            apps.tanzu.vmware.com/workload-type: server
      - name: worker-template
        selector:
          matchLabels:
            apps.tanzu.vmware.com/workload-type: worker
...
  selectorMatchExpressions:
  - key: apps.tanzu.vmware.com/workload-type
    operator: In
    values:
    - web
    - server
    - worker
  selectorMatchFields:
  - key: spec.image
    operator: Exists
status:
...

tanzu apps csc get basic-image-to-url -ojson

{
    "apiVersion": "carto.run/v1alpha1",
    "kind": "ClusterSupplyChain",
    "metadata": {
...
        "name": "basic-image-to-url",
        "resourceVersion": "1711559",
        "uid": "60a044c7-0af3-4a2e-847b-bdf40f690d9a"
    },
    "spec": {
        "params": [
           ...
        ],
        "resources": [
            {
                "name": "image-provider",
                "params": [
                    {
                        "default": "default",
                        "name": "serviceAccount"
                    }
                ],
                "templateRef": {
                    "kind": "ClusterImageTemplate",
                    "name": "image-provider-template"
                }
            },
           ...
            {
                ...
                "templateRef": {
                    "kind": "ClusterConfigTemplate",
                    "options": [
                        {
                            "name": "config-template",
                            "selector": {
                                "matchLabels": {
                                    "apps.tanzu.vmware.com/workload-type": "web"
                                }
                            }
                        },
                       ...
                    ]
                }
            },
            ...
        ],
        "selectorMatchExpressions": [
            {
                "key": "apps.tanzu.vmware.com/workload-type",
                "operator": "In",
                "values": [
                    "web",
                    "server",
                    "worker"
                ]
            }
        ],
    },
    "status": {
        ...
}

Describe alternatives you've considered

Use -o as shorthand for --output

Additional context

Behaviour should be similar to workload get -o yaml/json and workload list -o yaml/json

[heyjcollins]

This is a nice-to-have feature that hasn't been explicitly requested by end-users.
Because we'll be creating a new supply-chain plugin to LCM supply chains and the current version of supply chains will be deprecated, we've made a decision against investing in this work.