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=5.627e-05; Maximum crossload hidden layer difference=2.899e-04;
Maximum conversion output difference=5.627e-05; Maximum conversion hidden layer difference=2.899e-04;


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

tf_model.h5

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+oid sha256:eac9b2e42d227db89c7bef7aef7f367c612c6b3f14c43239cf0554ac2d9f1bca
+size 593349368