[interop] Add grpc-java 1.65.0 to client_matrix.py (#37095)

Adhoc run: https://btx.cloud.google.com/invocations/86e31524-8272-46ec-acab-f65cf5387489

Closes #37095

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/37095 from ejona86:java-1.65.0 db1e089b4a
PiperOrigin-RevId: 650747500

tools/interop_matrix/client_matrix.py

@@ -445,6 +445,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.61.0", ReleaseInfo()),
             ("v1.63.1", ReleaseInfo()),
             ("v1.64.0", ReleaseInfo()),
+            ("v1.65.0", ReleaseInfo()),
         ]
     ),
     "python": OrderedDict(