Update NGCA post-processing to handle AUSPOS-v3.0

[adeane-ga]

Summary

• This branch contains additions to handle the change from AUSPOS-v2.4 to AUSPOS-v3.0 in NGCA processing. The difference is that the AUSPOS SINEX files are in ITRF2020. For GDA2020, we need them to be in ITRF2014.
• The main addition is the transformSINEX_NGCA.py script which implements the transformation.
• This script relies on already merged pull requets to GeodePy: More SINEX convenience functions for GNSS module GeodePy#153.
• It also relies on this new minor pull request in GeodePy: Minor update to writing out of lines to SINEX in particular functions GeodePy#154.
• The run_scripts are also modified to reflect the additional steps.