Revert #86466 (#87405)

Revert "Apply plugin route ReqAction to ds_proxy authorization (#86466)"

This reverts commit 53f94ac50dde7bc6c25f6a8254e85a2e8b1ae138.

pkg/plugins/plugins.go

@@ -204,6 +204,10 @@ type Route struct {
 	Body         json.RawMessage `json:"body"`
 }
 
+func (r *Route) RequiresRBACAction() bool {
+	return r.ReqAction != ""
+}
+
 // Header describes an HTTP header that is forwarded with
 // the proxied request for a plugin route
 type Header struct {