Update inference widget from adapter-transformers to Adapters

[calpt]

Similar to https://github.com/huggingface/hub-docs/pull/1184 and https://github.com/huggingface/huggingface.js/pull/459, this PR replaces the deprecated adapter-transformers package with the new adapters package. Also adds new pipelines for text generation and summarization.

Open points:

• I haven't renamed the folder from adapter_transformers for now to break anything. Will rename in case this is possible.
• Currently installs directly from our main branch due to a bug on our side. Updating once the fix is released.

[calpt]

hey, friendly ping on this. is there anything else needed from our side?

[osanseviero]

This is now deployed @calpt !

See

• https://huggingface.co/AdapterHub/roberta-base-pf-squad
• https://huggingface.co/AdapterHub/roberta-base-pf-conll2003?text=My+name+is+Clara+and+I+live+in+Berkeley%2C+California.

[calpt]

Awesome, thank you, @osanseviero!