Error in the latest version of huggingface `transformers` due to `no _attn_implementation attribute`.

[jalew188]

See https://github.com/MannLabs/alphapeptdeep/actions/runs/9146422692/job/25146596929#step:7:480

Failed: transformers-4.41.0

• Version: https://github.com/MannLabs/alphapeptdeep/actions/runs/9146422692/job/25146596929#step:5:111
• Message: https://github.com/MannLabs/alphapeptdeep/actions/runs/9146422692/job/25146596929#step:7:480

worked: transformers-4.40.2

• Version: https://github.com/MannLabs/alphapeptdeep/actions/runs/9061621304/job/24893765045#step:5:111

[jalew188]

See https://github.com/huggingface/transformers/blob/main/src/transformers/models/bert/modeling_bert.py#L467, and https://github.com/huggingface/transformers/blob/main/src/transformers/models/bert/modeling_bert.py#L476 about how to set config._attn_implementation.

[jalew188]

FIX #172