Add .withPipelineTempDirectory() Builder setting for file-based sinks

Per the discussion in dev@ mailing list: https://lists.apache.org/thread.html/r927907b17a33f672ee04826ba8d3cb7004d4c7e7c18608b3562f4e9c%40%3Cdev.beam.apache.org%3E

adds a Builder setting for core file-based sinks to use the user-specified PipelineOptions#tempLocation as the temp directory for file writes (before the files are renamed to the final output destination).