Add data and parity pieces flags to siac renter upload

MERGE REQUEST

Overview

This MR adds data-pieces and parity-pieces flags to the siac renter upload command. This enables users to upload files in the skyfile compatible 1-N redundancy scheme.

Example for Visual changes (ie Screenshot)

Issues Closed

N/A

Checklist

Review and complete the checklist to ensure that the MR is complete before assigned to an approver.

• All new methods, or updating methods have clear docstrings
• Testing added or updated for new methods
• Any new packages are added to Makefile and .gitlab-ci.yml
• API documentation updated for API updates
• Module README.md updated for changes to work flow
• Issue added to Sia-UI repo for new supporting features
• Changelog updated