install dev. version of accelerate in docker file
# What does this PR do?

With an offline discussion with @muellerzr regarding this CI failure
```
tests/trainer/test_trainer.py::TrainerIntegrationTest::test_auto_batch_size_finder
(line 776)  ImportError:
```
I update the docker file in this PR. Will try to build the new docker image once this PR is merged.

_The documentation is not available anymore as the PR was closed or merged._