Add v1.33.1 release of grpc-go to interop matrix

Also add the missing old releases

tools/interop_matrix/client_matrix.py

@@ -159,6 +159,10 @@ LANG_RELEASE_MATRIX = {
             ('v1.27.1', ReleaseInfo(runtimes=['go1.11'])),
             ('v1.28.0', ReleaseInfo(runtimes=['go1.11'])),
             ('v1.29.0', ReleaseInfo(runtimes=['go1.11'])),
+            ('v1.30.0', ReleaseInfo(runtimes=['go1.11'])),
+            ('v1.31.1', ReleaseInfo(runtimes=['go1.11'])),
+            ('v1.32.0', ReleaseInfo(runtimes=['go1.11'])),
+            ('v1.33.1', ReleaseInfo(runtimes=['go1.11'])),
         ]),
     'java':
         OrderedDict([