replace run_bufr2ioda.sh with run_bufr2ioda.py

[RussTreadon-NOAA]

g-w PR #1826 states that ush/ioda/bufr2ioda/run_bufr2iobs.sh must be in python (see comment here).

Given this, GDASApp branch feature/bufr2iodapy was created to replace run_bufr2ioda.sh with run_bufr2ioda.py.

To fully integrate run_bufr2ioda.py into g-w the decision was made to replace variable DUMP in parm/ioda/bufr2ioda/bufr2ioda_satwind_amv_goes.json with CDUMP, the current cycle. With this change tests reported in g-w #1826 verify that run_bufr2ioda.py generates output identical to that from run_bufr2ioda.sh.

This PR is opened to replace run_bufr2ioda.sh with run_bufr2ioda.py and update parm/ioda/bufr2ioda/bufr2ioda_satwind_amv_goes.json as described above.

Fixes #599

[CoryMartin-NOAA]

Nothing wrong with what is here, but this is mostly a direct translation of bash to python, if we are using python, we should take advantage of that fact.

[RussTreadon-NOAA]

Test GDASApp branch feature/bufr2iodapy along with g-w branch RussTreadon-NOAA:feature/iodaobs on Hera and Orion for 20210814 18 gdas. Job prepatmiodaobs ran to completion on both machines. IODA dump files were created for GOES-16 and GOES-17 ABI from the bufr satwnd dump file.

Does this PR require any additional revisions?

[CoryMartin-NOAA]

Good for me for now, we can revisit later if we find a 'clever' way to do this in python