GFSv16.3.15 - Update to obsproc.v1.2

[KateFriedman-NOAA]

What new functionality do you need?

Update to obsproc.v1.2 when it is introduced in operations. Also make related GSI change to turn GMI back on.

What are the requirements for the new functionality?

• [x] Update obsproc_ver in version files in dev/gfs.v16
• [ ] Update obsproc_ver in version files in develop
• [ ] Install obsproc.v1.2 on R&D machines
• [ ] Uncomment GMI line scripts/exglobal_atmos_analysis.sh (commented out in https://github.com/NOAA-EMC/global-workflow/pull/1404).
• [ ] Update ops version in RTD

Acceptance Criteria

New version works everywhere.

Suggest a solution (optional)

No response