AU_SI12_NRT_R04 LANCE NRT data source retries

[trey-stafford]

• Update earthaccess library version to ~=0.8.2.
• The code that downloads AU_SI12_NRT_R04 LANCE NRT data
  (``pm_tb_data.fetch.amsr.lance_amsr2`) now supports trying both data URLs
  provided by CMR (lance.nsstc.nasa.gov and lance.itsc.uah.edu) if the first one
  fails. Sometimes one mirror is available when the other is not.

[sc0tts]

This looks good to me.
Up to you whether to implement the "write this to a temp dir and then copy it" suggestion before merging into main

[trey-stafford]

This looks good to me. Up to you whether to implement the "write this to a temp dir and then copy it" suggestion before merging into main

I ended up implementing the re-try. I actually ran into this issue today! The nasa server seems to be responding again, but it's very slow. I canceled at one point, which led to a partial download that I needed to manually cleanup. That won't be a problem anymore!