AppProject in ArgoCD is seen as an orphaned resource

[jsoref]

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Checklist:

• [x] I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• [x] I've included steps to reproduce the bug.
• [x] I've pasted the output of argocd version.

Describe the bug

Argo self managed resources appear as orphaned

To Reproduce

1. Enable display of orphaned resources
2. Add some ignore items for them

    ignore:
         - kind: ResourceQuota
         - kind: Secret
           name: sh.helm.release.v1.*
         - kind: Secret
           name: '*-tls'

3. Go to the argocd application itself
4. Show orphaned resources
5. See Application - applications and AppProject - default

Expected behavior

A clear and concise description of what you expected to happen.

Screenshots

Version

{
    "Version": "v1.8.1+c2547dc",
    "BuildDate": "2020-12-10T02:59:21Z",
    "GitCommit": "c2547dca95437fdbb4d1e984b0592e6b9110d37f",
    "GitTreeState": "clean",
    "GoVersion": "go1.14.12",
    "Compiler": "gc",
    "Platform": "linux/amd64",
    "KsonnetVersion": "v0.13.1",
    "KustomizeVersion": "v3.8.1 2020-07-16T00:58:46Z",
    "HelmVersion": "v3.4.1+gc4e7485",
    "KubectlVersion": "v1.17.8",
    "JsonnetVersion": "v0.17.0"
}

Logs

Paste any relevant application logs here.

[jessesuen]

I think we should special case Application and AppProject and ApplicationSet as not orphaned resources.