[Model] IBM Granite 3.1

[tjohnson31415]

IBM just released new Granite 3.1 models (Press Release; HF Hub).

Tool calling with the new version is different becuase it uses a <tool_call> html-style string to mark the start of a tool call response instead of the <|tool_call|> token. The default chat template from HF Hub passes the unit tests, so I did not add a new chat template jinja file to the examples directory (but the current tool_chat_template_granite.jinja file should not be used with the 3.1 models).

[github-actions]

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[mgoin]

Nice to see no modeling changes. LGTM after removing print and with green build