forces s1_rdr2geo inside s1_geocode_slc to generate layers needed for layover shadow computation by creating a new runconfig with the correct flags enabled
allow runconfigs to be loaded by yaml string
removes unnecessary rdr2geo runconfig check
updates defaults so x and y layers are off by default
This PR:
s1_rdr2geo
insides1_geocode_slc
to generate layers needed for layover shadow computation by creating a new runconfig with the correct flags enabled