Fix `transformers`' DeepSpeed CI job
# What does this PR do?

The new (cu118) base docker image has pre-installed `transformer-engine` (which wasn't the case in the previous base image). This causes DeepSpeed CI job fails from the beginning with
```bash
E   ImportError: /usr/local/lib/python3.8/dist-packages/transformer_engine_extensions.cpython-38-x86_64-linux-gnu.so: undefined symbol: _ZN3c106detail23torchInternalAssertFailEPKcS2_jS2_RKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
```

This PR uninstall `transformer-engine` so @ydshieh won't be the breaking bad.
_The documentation is not available anymore as the PR was closed or merged._<|||||>Going to merge. cc @stas00 so you know now we are using CUDA 118 on CI (as you mentioned/requested once before)<|||||>super! thank you for the heads up, @ydshieh!