Dcoker images runtime -> devel
Updates the base image for the docker images used for testing to use the `devel` version of the original docker images instead of the `runtime` version, as it's the version necessary for some TF utilities to run.
Let me just add a failing example before this PR:
(just for the record)

```
tests/bart/test_modeling_tf_bart.py::TFBartModelTest::test_xla_mode
(line 54)  tensorflow.python.framework.errors_impl.InternalError: libdevice not found at ./libdevice.10.bc [Op:__inference_run_in_graph_mode_1125293]
```