chore: remove rbac psuedo resources, add custom verbs (#13276)

Removes our pseudo rbac resources like `WorkspaceApplicationConnect` in favor of additional verbs like `ssh`. This is to make more intuitive permissions for building custom roles.

The source of truth is now `policy.go`

scripts/rbacgen/codersdk.gotmpl

@@ -0,0 +1,18 @@
+// Code generated by rbacgen/main.go. DO NOT EDIT.
+package codersdk
+
+type RBACResource string
+
+const (
+	{{- range $element := . }}
+	Resource{{ pascalCaseName $element.FunctionName }} RBACResource = "{{ $element.Type }}"
+	{{- end }}
+)
+
+type RBACAction string
+
+const (
+	{{- range $element := actionsList }}
+	{{ $element.Enum }} RBACAction = "{{ $element.Value }}"
+	{{- end }}
+)