feat: Add fleet resource label to fleet namespace

[Arvindthiru]

Description of your changes

Fixes #

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[Arvindthiru]

Misunderstood the NamespaceSelector in ValidatingWebhook Object it selects the object that our webhook should handle based on the object's namespace and labels on the namespace, so no need to add labels on Role and Rolebindings we create

[ryanzhang-oss]

How do we select Role and RoleBindings then?

Misunderstood the NamespaceSelector in ValidatingWebhook Object it selects the object that our webhook should handle based on the object's namespace and labels on the namespace, so no need to add labels on Role and Rolebindings we create

[ryanzhang-oss]

I just realized that we have new version of API but the webhooks only works for v1alpha1. How should we handle that?

[Arvindthiru]

How do we select Role and RoleBindings then?

Misunderstood the NamespaceSelector in ValidatingWebhook Object it selects the object that our webhook should handle based on the object's namespace and labels on the namespace, so no need to add labels on Role and Rolebindings we create

Since we add the label on the namespace, we can specify the validating webhook such that it only handle roles and rolebindings within the namespace with the label we added

[Arvindthiru]

I just realized that we have new version of API but the webhooks only works for v1alpha1. How should we handle that?

We can do something like this #397

[michaelawyu]

Aside from the nit everything looks great ✨