Add TF weights

Model converted by the [`transformers`' `pt_to_tf` CLI](https://github.com/huggingface/transformers/blob/main/src/transformers/commands/pt_to_tf.py). All converted model outputs and hidden layers were validated against its Pytorch counterpart.

Maximum crossload output difference=2.384e-05; Maximum crossload hidden layer difference=7.629e-05;
Maximum conversion output difference=2.384e-05; Maximum conversion hidden layer difference=7.629e-05;


CAUTION: The maximum admissible error was manually increased to 0.0005!

tf_model.h5

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+version https://git-lfs.github.com/spec/v1
+oid sha256:866db6507c428d66d9ba921a003d8af9c16bf3fbbe38dded08c6f0492b4b68ef
+size 134357584