Add Python 3.10 nightly build (#4970)

Author: will-cromar

infra/tpu-pytorch-releases/artifacts.auto.tfvars

@@ -3,6 +3,10 @@ nightly_package_version = "2.0"
 # Built once a day from master.
 nightly_builds = [
   { accelerator = "tpu" },
+  {
+    accelerator  = "tpu"
+    python_version = "3.10"
+  },
   {
     accelerator  = "cuda"
     cuda_version = "11.8"