Add TF weights

Model converted by the `transformers`' `pt_to_tf` CLI -- all converted model outputs and hidden layers were validated against its Pytorch counterpart. Maximum crossload output difference=1.144e-05; Maximum converted output difference=1.144e-05.

tf_model.h5

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0a1adca0fb5996670e0596a7435f796bb8d2256d9addbd92d12d137a841a0399
+size 498038760