[DO NOT SUBMIT] Run TPU examples for PR commits.
Trying out the CircleCI flow. I'll delete this PR after testing.
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=h1) Report
> Merging [#6448](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/bc820476a5c72060f810f825298befd5ec85da4d&el=desc) will **increase** coverage by `0.09%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/6448/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #6448      +/-   ##
==========================================
+ Coverage   79.98%   80.08%   +0.09%     
==========================================
  Files         153      153              
  Lines       28005    28005              
==========================================
+ Hits        22401    22429      +28     
+ Misses       5604     5576      -28     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/modeling\_tf\_distilbert.py](https://codecov.io/gh/huggingface/transformers/pull/6448/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl9kaXN0aWxiZXJ0LnB5) | `64.47% <0.00%> (-32.95%)` | :arrow_down: |
| [src/transformers/generation\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/6448/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9nZW5lcmF0aW9uX3RmX3V0aWxzLnB5) | `86.46% <0.00%> (+7.26%)` | :arrow_up: |
| [src/transformers/modeling\_tf\_gpt2.py](https://codecov.io/gh/huggingface/transformers/pull/6448/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl9ncHQyLnB5) | `94.72% <0.00%> (+22.87%)` | :arrow_up: |
| [src/transformers/tokenization\_albert.py](https://codecov.io/gh/huggingface/transformers/pull/6448/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy90b2tlbml6YXRpb25fYWxiZXJ0LnB5) | `87.50% <0.00%> (+58.65%)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=footer). Last update [bc82047...6567722](https://codecov.io/gh/huggingface/transformers/pull/6448?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>The TPU test succeeded: https://app.circleci.com/pipelines/github/huggingface/transformers/10480/workflows/c669aea7-b861-4b1b-b90c-d8c8b50e60dc/jobs/72547

I'll delete this PR now