Add the capability to assimilate the MADIS snow depth for global-workflow

[jiaruidong2017]

This PR adds bufr_snocvr.yaml to covert GTS based madis snow depth data into IODA format and adds snocvr_snow.yaml to enable the global-workflow to assimilate the madis snow depth data from GTS.

This PR also updates the configures gdas_land_gts_only.yaml and gdas_land_prototype.yaml to include the new madis snow depth data for global-workflow.

This PR contributes to the NOAA-EMC/global-workflow#1836 for assimilating the MADIS snow depth.

[emcbot]

Automated GDASApp Testing Results:
Machine: hera

Start: Sat Sep  9 23:15:22 UTC 2023 on hfe10
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Sat Sep  9 23:55:50 UTC 2023
---------------------------------------------------
Tests:                                 *SUCCESS*
Tests: Completed at Sat Sep  9 23:57:10 UTC 2023
Tests: 100% tests passed, 0 tests failed out of 25

[aerorahul]

Changes look good to me.
I have one suggestion -- we have been trying to move away from the $( ) syntax in yaml and replace it with {{ }}. It is still necessary to have the ${ } syntax, especially when including nested yamls. Would you be able and willing to replace $( ) with {{ }} in this PR?

[aerorahul]

lgtm

[jiaruidong2017]

@aerorahul Thanks for quick reviews.

[emcbot]

Automated Global-Workflow GDASApp Testing Results:
Machine: hera

Start: Tue Sep 12 19:06:30 UTC 2023 on hfe07
---------------------------------------------------
Build:                                 *SUCCESS*
Build: Completed at Tue Sep 12 20:12:44 UTC 2023
---------------------------------------------------
Tests:                                 *SUCCESS*
Tests: Completed at Tue Sep 12 20:45:25 UTC 2023
Tests: 100% tests passed, 0 tests failed out of 49