[New Feature]: Staging input Data

[mgovorcin]

Checked for duplicates

Yes - I've already checked

Alternatives considered

Yes - and alternatives don't suffice

Related problems

Describe the feature request

• Add staging static layers once available in ASF DAAC:
  OPERA_L3_DISP-S1-STATIC_F08622_20140403_S1A_v1.0_dem.tif
  OPERA_L3_DISP-S1-STATIC_F08622_20140403_S1A_v1.0_line_of_sight_enu.tif

• Add support to do staging with s3 paths