Fix `check_decoder_model_past_large_inputs` for `class TFBartModelTest`
# What does this PR do?

The usage of `decoder_position_ids` in `check_decoder_model_past_large_inputs` will produce different results **when the initial attention mask (i.e. the called `past`) contains `0`**, and makes the test flaky.

This PR remove `check_decoder_model_past_large_inputs` from this test. This also makes the test identical to its PT equivalent test, as well as the test implemented in other TF models.


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