Add resampler args.
TODO: Add to https://docs.google.com/spreadsheets/d/1lQJzSIE6iUhlRQ5O4gjHBnIpsqFS7w3DQw3wX5_66P8/edit#gid=1881169084
Changes
This MR adds command line arguments to configure the py3 resampler, and sets the default to the Kaiser resampler.
Purpose
This MR should be reviewed after the other changes are merged. It makes self-contained changes following the other gstreamer & python upgrades.
Edited by Timothy Davies