[interop] Add v1.63.0 release of grpc-go to interop matrix (#36248)

Closes #36248

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36248 from arvindbr8:go_release 4b0f653fe8
PiperOrigin-RevId: 621651570

tools/interop_matrix/client_matrix.py

@@ -298,6 +298,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.60.1", ReleaseInfo(runtimes=["go1.19"])),
             ("v1.61.0", ReleaseInfo(runtimes=["go1.19"])),
             ("v1.62.1", ReleaseInfo(runtimes=["go1.19"])),
+            ("v1.63.0", ReleaseInfo(runtimes=["go1.19"])),
         ]
     ),
     "java": OrderedDict(