S3AInputStream to be resilient to faiures in abort(); translate AWS Exceptions

Stack overflow issue complaining about ConnectionClosedException during S3AInputStream close(), seems triggered by an EOF exception in abort. That is: we are trying to close the stream and it is failing because the stream is closed. oops.

https://stackoverflow.com/questions/64412010/pyspark-org-apache-http-connectionclosedexception-premature-end-of-content-leng

Looking @ the stack, we aren't translating AWS exceptions in abort() to IOEs, which may be a factor.