Revert "Use watch param instead of deprecated /watch/ prefix"

cmd/libs/go2idl/client-gen/generators/generator_for_type.go

@@ -321,8 +321,8 @@ func (c *$.type|privatePlural$) UpdateStatus($.type|private$ *$.type|raw$) (resu
 var watchTemplate = `
 // Watch returns a $.watchInterface|raw$ that watches the requested $.type|privatePlural$.
 func (c *$.type|privatePlural$) Watch(opts $.ListOptions|raw$) ($.watchInterface|raw$, error) {
-	opts.Watch = true
 	return c.client.Get().
+		Prefix("watch").
 		$if .namespaced$Namespace(c.ns).$end$
 		Resource("$.type|allLowercasePlural$").
 		VersionedParams(&opts, $.apiParameterCodec|raw$).

cmd/libs/go2idl/client-gen/testoutput/clientset_generated/test_internalclientset/typed/testgroup/internalversion/testtype.go

@@ -149,8 +149,8 @@ func (c *testTypes) List(opts v1.ListOptions) (result *testgroup.TestTypeList, e
 
 // Watch returns a watch.Interface that watches the requested testTypes.
 func (c *testTypes) Watch(opts v1.ListOptions) (watch.Interface, error) {
-	opts.Watch = true
 	return c.client.Get().
+		Prefix("watch").
 		Namespace(c.ns).
 		Resource("testtypes").
 		VersionedParams(&opts, api.ParameterCodec).