share/eds: Return errUnsupportedOperation for Put/PutMany in the Blockstore once we update Bitswap

[Wondertan]

Bitswap, in the version we are currently using, stores data in the Blockstore automatically. However, as we are moving to rely on EDS Store, the Blockstore from it only gives read-only access to data, which means that Bitswap is doing unnecessary writes, and forces us to succeed in those writes so that Bitswap is not failing.

However, in the recent Bitswap changes, the storing functionality was removed, and now, it moved to the Blockservice layer. This means that after updating it, we can return the proper errUnsupportedOperation error and make Put/PutMany explicitly fail when someone uses them

[Wondertan]

It is not relevant anymore, and we have to support this operation as per. #2424