transformers

acfb714b - Improve TF weight loading, especially PT crossloading (#21792)

Improve TF weight loading, especially PT crossloading (#21792) * First commit for the improved PT-TF weight loading * Remove workarounds from TFEncoderDecoder tests * Allow a custom weight renaming function in from_pretrained and use that to clean up EncoderDecoder * make fixup * First attempt at visionencoderdecoder * Disable tensorfloat32 in tests to get consistent outputs * Quick fix to tf_vision_encoder_decoder tests * make fixup * Update Blenderbot tests * Remove unused arg in modeling_tf_opt * load_tf_sharded_weights had strict=True! This meant transfer learning was impossible, so I'm setting it to False. * Support prefixes when loading sharded TF checkpoints * make fixup * Add test to load sharded models with a weight prefix * Fix sharded weight loading test * Add a test for transfer from a sharded checkpoint * make fixup * Add test to check that crossloading from PT with a prefix works * Refactor from_pretrained in the encoderdecoder classes * Refactor from_pretrained in the encoderdecoder classes * missmatched -> mismatched * Explicitly check for None * No comments showing my very impressive and attractive knowledge of Py3.9+ * Disable TF32 across all TF tests