[cbor support] Adds supported_output_formats and supported_input_formats to Function metadata

[freider]

This is prep for the addition of actual cbor support in the client (see #3474 which is being reworked now to use this information)

• Adds proto fields supported_input_formats and supported_output_formats
• Propagate/set these correctly for existing functions and methods (disambiguating asgi and pickle at the moment)
• Adds DATA_FORMAT_CBOR, without actually implementing it in this PR (see Cbor2 serialization for function calling [SDK-584] #3474)

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Compatibility checklist

Check these boxes or delete any item (or this section) if not relevant for this PR.

• Client+Server: this change is compatible with old servers
• Client forward compatibility: this change ensures client can accept data intended for later versions of itself

Note on protobuf: protobuf message changes in one place may have impact to
multiple entities (client, server, worker, database). See points above.

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Release checklist

If you intend for this commit to trigger a full release to PyPI, please ensure that the following steps have been taken:

• Version file (modal_version/__init__.py) has been updated with the next logical version
• Changelog has been cleaned up and given an appropriate subhead

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Changelog

[freider]

@prbot approve

[modal-pr-review-automation]

Approved 👍. @mwaskom will follow-up review this.