[core-client-rest] Streamed upload developer experience improvements

[timovv]

Would be nice to have support for inputting these when uploading binary data:

• Resettable streams (i.e. () => NodeJS.ReadableStream | ReadableStream<Uint8Array>). core-rest-pipeline supports this already so probably just need to update the types here
• For multipart/form-data file uploads, we could infer the filename from the path field on fs.ReadableStream when a stream created with fs.createReadStream is passed in, much like we do for File objects. Currently this does not happen and the user has to specify the filename separately.