GitLab

* Adding warning messages to BERT for missing attention masks

These warning messages when there are pad tokens within the input ids and
no attention masks are given. The warning message should only show up once.

* Adding warning messages to BERT for missing attention masks

These warning messages are shown when the pad_token_id is not None
and no attention masks are given. The warning message should only
show up once.

* Ran fix copies to copy over the changes to some of the other models

* Add logger.warning_once.cache_clear() to the test

* Shows warning when there are no attention masks and input_ids start/end with pad tokens

* Using warning_once() instead and fix indexing in input_ids check

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Co-authored-by: JB Lau <hckyn@voyager2.local>