[PTFM-10388] Fix and test for dx get record --no-ext

Conflicts:
	src/python/dxpy/scripts/dx.py
Changelog and dxR version update for v0.79.2
PTFM-10340: dx-app-wizard now creates empty authorizedUsers entry
PTFM-10317: fix tests for new behavior (default empty ACL for new apps)
Bugfix: allow --class workflow in dx find data
Changelog and dxR version update for v0.79.3