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=3.529e-05; Maximum crossload hidden layer difference=1.526e-04;
Maximum conversion output difference=3.529e-05; Maximum conversion hidden layer difference=1.526e-04;


CAUTION: The maximum admissible error was manually increased to 0.0002!

tf_model.h5

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+version https://git-lfs.github.com/spec/v1
+oid sha256:87cb9f101912d56637bad66cd92b0143cacbe546f0f7d8339a16ec0fe9d19578
+size 497960016