The Different SDKs Can Produce Different Skylinks

[mrcnski]

This can happen e.g. due to discrepancies in the detected Content-Type.

See https://gitlab.com/NebulousLabs/Sia/-/issues/4350.

We'd ideally like to have parity between the different SDKs, but it is not realistic to expect them to always produce the same skylinks. The SDKs have different implementations, in particular different libraries to detect the content-type.

We are also currently prioritizing just the skynet-js SDK. I'll table this for now.