API requests that involve uploading files should never be retried

[Alex1304]

To Reproduce:

1. Send a request that uploads a file, like sending a message with an attachment
2. Have the request fail with a retryable code (in my case I came across a 504 Gateway Timeout)

Expected Behavior:
I expect files to be properly uploaded after retry

Actual Behavior:
It will result in zero-byte files being uploaded. This is because the InputStream provided by the user has already been consumed and closed during the first request attempt.

Version:
Discord4J 3.2.6

In this scenario I think the best option is never to retry requests that accept an InputStream. Another option would be to allow passing a Supplier<InputStream> or something similar, but I feel like it would complicate things both for the user and the d4j API.