Different Weights between google-bert (uncased_L-12_H-768_A-12) and Huggingface-bert (bert-base-uncased)
Environment: torch==1.8.1+cu111  transformers==4.3.3

```python
# google-bert (uncased_L-12_H-768_A-12)
model = BertForPreTraining.from_pretrained('uncased_L-12_H-768_A-12/', from_tf=True)
print(model.bert.embeddings.word_embeddings.weight)
```
```python
# google-bert (uncased_L-12_H-768_A-12) output
Parameter containing:
tensor([[-0.0314, -0.0045,  0.0182,  ..., -0.0309,  0.0204, -0.0345],
        [-0.0295, -0.0486,  0.0746,  ..., -0.0363,  0.0262, -0.0108],
        [-0.0328, -0.0582, -0.0149,  ..., -0.0932,  0.0444,  0.0221],
        ...,
        [-0.0337, -0.0518, -0.0280,  ..., -0.0174,  0.0078, -0.0010],
        [-0.0022, -0.0297, -0.0167,  ..., -0.0472, -0.0006,  0.0128],
        [-0.0631, -0.0144, -0.0232,  ...,  0.0072, -0.0704, -0.0479]],
       requires_grad=True)
```

```python
# Huggingface-bert (bert-base-uncased)
model = BertModel.from_pretrained('bert-base-uncased')
print(model.embeddings.word_embeddings.weight)
```
```python
# Huggingface-bert (bert-base-uncased) output
Parameter containing:
tensor([[-0.0102, -0.0615, -0.0265,  ..., -0.0199, -0.0372, -0.0098],
        [-0.0117, -0.0600, -0.0323,  ..., -0.0168, -0.0401, -0.0107],
        [-0.0198, -0.0627, -0.0326,  ..., -0.0165, -0.0420, -0.0032],
        ...,
        [-0.0218, -0.0556, -0.0135,  ..., -0.0043, -0.0151, -0.0249],
        [-0.0462, -0.0565, -0.0019,  ...,  0.0157, -0.0139, -0.0095],
        [ 0.0015, -0.0821, -0.0160,  ..., -0.0081, -0.0475,  0.0753]],
       requires_grad=True)
```


**Why the output of `embeddings.word_embeddings.weight` is different?**


When checking the  [model card]() of `google/bert_uncased_L-12_H-768_A-12`, it states the following:

> Note that the BERT-Base model in this release is included for completeness only; it was re-trained under the same regime as the original model.

Hence, `google/bert_uncased_L-12_H-768_A-12` is a retrained version of `bert-base-uncased`. So of course, the parameter values will differ.<|||||>@NielsRogge  Is the `google/bert_uncased_L-12_H-768_A-12` equal to `https://storage.googleapis.com/bert_models/2020_02_20/uncased_L-12_H-768_A-12.zip`